S-8357B60MC-NJT-T2 Seiko, S-8357B60MC-NJT-T2 Datasheet

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S-8357B60MC-NJT-T2

Manufacturer Part Number
S-8357B60MC-NJT-T2
Description
SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR
Manufacturer
Seiko
Datasheet
• SOT-89-3
• SOT-23-3
• SOT-23-5
• 6-Pin SNB(B)
• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs
• Power supplies for audio equipment such as portable CD/MD players
• Constant voltage power supplies for cameras, video equipment, and communications equipment
• Power supplies for microprocessors
Rev.4.1
• Low voltage operation: Startup is guaranteed from 0.9 V (I
• Low current consumption: During operation: 25.9 µA (3.3 V, 100 kHz, typ.)
• Duty ratio: Built-in PWM/PFM switching control circuit (S-8356/58)
• External parts: Coil, diode, capacitor, and transistor
• Output voltage: Can be set between 1.5 and 6.5 V (for V
• Oscillation frequency: 100 kHz, 250 kHz, 300 kHz, 600 kHz
• Soft start function: 6 ms (100 kHz, typ.)
• Shutdown function
Features
Packages
Applications
SUPER-SMALL PACKAGE PWM CONTROL,
PWM/PFM SWITCHING CONTROL
STEP-UP SWITCHING REGULATOR
_00
15 to 83% (100 kHz models), 15 to 78% (250 kHz, 300 kHz, and 600 kHz models)
V
(Package code: UP003-A)
(Package code: MP003-A)
(Package code: MP005-A)
(Package code: BD006-A)
DD
/V
OUT
separate types) in 0.1 V steps. Accuracy of ±2.4%.
During shutdown: 0.5 µA (max.)
The S-8355/56/57/58 Series is a CMOS step-up switching regulator
which mainly consists of a reference voltage source, an oscillation
circuit, an error amplifier, a phase compensation circuit, a PWM
control circuit (S-8355/57) and a PWM/PFM switching control circuit
(S-8356/58). With an external low-on-resistance Nch Power MOS,
this product is ideal for applications requiring high efficiency and a
high output current.
The S-8355/57 Series realizes low ripple, high efficiency, and
excellent transient characteristics due to a PWM control circuit whose
duty ratio can be varied from 0% to 83% (from 0% to 78% for 250 kHz,
300 kHz, and 600 kHz models), an excellently designed error amplifier
and a phase compensation circuit.
S-8356/58 Series operation can be switched under a light load to a
PFM control circuit with a duty ratio of 15% via a PWM/PFM switching
control circuit to prevent a decline in the efficiency due to the IC
operating current.
Seiko Instruments Inc.
DD
/V
OUT
OUT
= 1 mA)
separate types) or 2.0 and 6.5 V (for other than
S-8355/56/57/58 Series
1

Related parts for S-8357B60MC-NJT-T2

S-8357B60MC-NJT-T2 Summary of contents

Page 1

... During shutdown: 0.5 µA (max.) • Duty ratio: Built-in PWM/PFM switching control circuit (S-8356/58 83% (100 kHz models 78% (250 kHz, 300 kHz, and 600 kHz models) • External parts: Coil, diode, capacitor, and transistor • Output voltage: Can be set between 1.5 and 6.5 V (for V separate types) in 0.1 V steps. Accuracy of ± ...

Page 2

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series Block Diagram (1) S-8357/58 Series Type ( ) Without shutdown function Oscillation Circuit power supply PWM or PWM /PFM switching control circuit EXT Soft start Phase built-in reference compensation power supply circuit ...

Page 3

... The control types, product types, output voltage, and packages for the S-8355/56/57/58 Series can be selected at the user’s request. Please refer to the “Product name selection guide” for the definition of the product name and “Product Name List” for the full product names. ...

Page 4

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series 2. Package and Function List by Product Type Series Name S-8355 Series (Shutdown function + V S-8356 Series K = 100 kHz 250 kHz 300 kHz 600 kHz (Normal product 100 kHz 250 kHz 300 kHz ...

Page 5

... IC direction in tape specifications T2: SOT-89-3, SOT-23-3, SOT-23-5 TF: 6-Pin SNB(B) *2 Product name (abbreviation) Package name (abbreviation) UA: SOT-89-3 MA: SOT-23-3 MC: SOT-23-5 BD: 6-Pin-SNB(B) Output voltage (Ex. When the output voltage is 1 expressed as 15.) Product type B: Normal product, H: Normal product, F: Normal product, N: Normal product separate type, DD ...

Page 6

... V 3.3 V S-8357B33MC-NIS-T2  3.5 V 3.6 V S-8357B36MC-NIV-T2 4.8 V S-8357B48MC-NJH-T2 5.0 V S-8357B50MC-NJJ-T2 5.2 V S-8357B52MC-NJL-T2 5.4 V S-8357B54MC-NJN-T2 6.0 V S-8357B60MC-NJT-T2 Remark Please consult our sales person for products with an output voltage other than those specified above. 6 Table 4 S-8355LxxMC Series S-8355MxxMC Series    S-8355M18MC-MCD-T2 S-8355L20MC-NCF-T2 S-8355M20MC-MCF-T2  S-8355M31MC-MCQ-T2   ...

Page 7

... V S-8358B31MC-NQQ-T2 3.2 V S-8357B32MC-NQR-T2 3.3 V S-8358B33MC-NQS-T2 3.5 V S-8358B35MC-NQU-T2 3.6 V S-8358B36MC-NQV-T2 3.8 V S-8358B38MC-NQX-T2 5.0 V S-8358B50MC-NRJ-T2  5.3 V 6.0 V S-8358B60MC-NRT-T2 Remark Please consult our sales person for products with an output voltage other than those specified above. 4-6. S-8358 Series (2) Model S-8357GxxMC Series Output Voltage 2.0 V   2.5 V  2.6 V  3.0 V  3.1 V 3.2 V  3.3 V  ...

Page 8

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series Pin Assignment SOT-89-3 Top view Figure 5 SOT23-3 Top view Figure 6 8 Products: S-8357/58 Series Types (Without shutdown function Pin No. Pin Name 1 VSS GND pin 2 VOUT ...

Page 9

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 SOT23-5 Top view Figure 7 Products: S-8355/56 Series Types (With shutdown function Pin No. Pin Name 1 VOUT Output voltage pin 2 VDD IC power supply pin Shutdown pin ...

Page 10

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series 6-Pin SNB(B) Top view Figure 8 10 Products: S-8355/56 Series Types (With shutdown function Pin No. Pin Name Shutdown pin 1 ON/OFF “H”: Normal operation (Step-up operation) “ ...

Page 11

... Operating temperature Storage temperature *1. With shutdown function *2. For V /V separate types DD OUT Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Table 18 Symbol V OUT V ON/OFF ...

Page 12

... V /V separate type: DD OUT Step-up operation is performed from V However, 1.8 ≤ V ≤ recommended to stabilize the output voltage and oscillation frequency ≥ 1.8 V must be applied for products with a set value of less than 1.9 V Table 19 Conditions   OUT No external parts, voltage applied to V ...

Page 13

... OUT( separate type: DD OUT Step-up operation is performed from V However, 1.8 ≤ V ≤ recommended to stabilize the output voltage and oscillation frequency ≥ 1.8 V must be applied for products with a set value of less than 1.9 V.) DD Table 20 Conditions   OUT No external parts, V ...

Page 14

... V OUT( separate type: DD OUT Step-up operation is performed from V However, 1.8 ≤ V ≤ recommended to stabilize the output voltage and oscillation frequency. DD ≥ 1.8 V must be applied for products with a set value of less than 1.9 V Table 21 Conditions   OUT ...

Page 15

... CPH3210 of Sanyo Electric Co., Ltd. - Base resistor (Rb): 1.0 kΩ - Base capacitor (Cb): 2200 pF (ceramic type × 0.6 applied OUT(S) OUT OUT(S) Remark V specified above is the set output voltage value, and V OUT(S) Table 22 Conditions   OUT V No external parts, voltage applied to OUT = 1 mA, ...

Page 16

... V OUT( separate type: DD OUT Step-up operation is performed from V However, 1.8 ≤ V ≤ recommended to stabilize the output voltage and oscillation frequency. DD ≥ 1.8 V must be applied for products with a set value of less than 1.9 V Table 23 Conditions   OUT ...

Page 17

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 Test Circuits 1. Oscilloscope 2. 3. Oscilloscope 4. EXT (ON/OFF) VOUT (VDD) VSS 0.1 µF Figure EXT VOUT − (VDD) (ON/OFF) VSS 0.1 µF Figure 10 EXT (ON/OFF) VOUT A (VDD) VSS Figure ...

Page 18

... The S-8356/58 Series operates under PWM control with the pulse width duty changing from 15% to 83% (78% for types high output load current area. On the other hand, the S-8356/58 Series operates under PFM control with the pulse width duty fixed at 15 low output load current area, and pulses are skipped when the low output load current is low according to the load current and output to the switching transistor ...

Page 19

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 3. Shutdown pin (Only for SOT-23-5 package products and Q types and for 6-Pin SNB(B) package products.) Stops or starts step-up operation. Switching the shutdown pin to the “L” level stops operation of all the internal circuits and reduces the current consumption significantly ...

Page 20

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series 4. Operation The following are basic equations [(1) through (7)] of the step-up switching regulator (refer to Figure 14 Figure 14 Step-up Switching Regulator Circuit for Basic Equations Voltage at the CONT pin at the moment M1 is turned ON (current I ...

Page 21

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 During t , the energy is stored in L and is not transmitted from V , the energy of the capacitor (C OUT goes to the lowest level after M1 is turned ON (t transmitted through the diode to C the maximum value (ripple voltage: V match ...

Page 22

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series When substituting equation (11) for equation (15 P-P Therefore to reduce the ripple voltage important that the capacitor connected to the output pin has a large capacity and a small ESR − ...

Page 23

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 External Parts Selection The relationship between the major characteristics of the step-up circuit and the characteristics parameters of the external parts are shown in Figure 15. For larger output current? Smaller inductance Smaller DC resistance of inductor ...

Page 24

... OUT If the oscillation frequency is higher, a smaller L value can be chosen, making the coil smaller. The recommended inductances are 100 µH inductor for B, E, and K types µH inductor for and M types, 3 µH inductor for types. Choose an inductor so that I the inductor causes magnetic saturation, much lower efficiency and destruction of the IC chip due to a large current ...

Page 25

... A stable voltage range in this IC depends on the ESR. Although the inductance (L) is also a factor, an ESR of 30 mΩ to 500 mΩ draws out the characteristics. However, the best ESR may depend on L, the capacitance, the wiring and the application (output load). Therefore, fully evaluate the ESR under actual conditions to determine the best value. “ ...

Page 26

... MOS FET are supplied from the stepped-up output voltage V MOS FET is driven more effectively. Depending on the MOS FET you use in your device, there is a chance of a current overrun at power ON. Thoroughly test all settings with your device before deciding on which one to use. Also, try to use a MOS FET with an input capacitance of 700 pF or less ...

Page 27

... and Q types) DD OUT The and Q types are ideal for the following applications because the power pin for the IC chip and the VOUT pin for the output voltage are separated: (1) When changing the output voltage by external resistance. ...

Page 28

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series Standard Circuits (1) S-8357BxxMA, S-8357BxxUA, S-8358BxxMA, S-8358BxxUA L 2200 − 1 kΩ (2) S-8357BxxMC, S-8357FxxMC/BD, S-8357HxxMC/BD, S-8357NxxMC/BD S-8358BxxMC, S-8358FxxMC/BD, S-8358HxxMC/BD, S-8358NxxMC/BD L 2200 − 1 kΩ (3) S-8357ExxMC, S-8357GxxMC/BD, S-8357JxxMC/BD, S-8357PxxMC/BD ...

Page 29

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 (4) S-8357ExxMC, S-8357GxxMC/BD, S-8357JxxMC/BD S-8358ExxMC, S-8358GxxMC/BD, S-8358JxxMC/BD L 2200 EXT − 1 kΩ (5) S-8355KxxMC/BD, S-8355LxxMC/BD, S-8355MxxMC/BD, S-8355QxxMC/BD S-8356KxxMC/BD, S-8356LxxMC/BD, S-8356MxxMC/BD, S-8356QxxMC/BD L 2200 EXT − 1 kΩ ON/OFF ...

Page 30

... Characteristics ripple voltage and spike noise occur in IC containing switching regulators. Moreover rush current flows at the time of a power supply injection. Because these largely depend on the coil, the capacitor and impedance of power supply used, fully check them using an actually mounted model. ...

Page 31

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 Application Circuits 1. LCD Power Supply The following example is an application power supply circuit (15 V/20 V output) to drive an LCD panel, and its characteristics − Output IC L Type Name Voltage ...

Page 32

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series (1-a) Output current (I ) vs. Efficiency (η) OUT 100 0.01 0 [mA] OUT (2-a) Output current (I ) vs. Efficiency (η) OUT 100 0.01 0 [mA] OUT (3-a) Output current (I ) vs. Efficiency (η) ...

Page 33

... If using small ESR parts such as ceramic capacitors for the output capacitance, attach a resistor (R1) corresponding to the ESR in series to the ceramic capacitor (C R1 may depend on L, the capacitance, the wiring, and the application (output load). The following example is a circuit using R1 = 100 mΩ, output voltage = 3.3 V, output load = 500 mA and its characteristics. V ...

Page 34

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series (1-a) Output current (I ) vs. Efficiency (η) OUT 100 0.01 0 [mA] OUT (1-c) Output current (I ) vs. Ripple voltage (Vr) OUT 100 = 0.01 0 [mA] OUT (2-a) Output current (I ) vs. Efficiency (η ...

Page 35

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 (3-a) Output current (I ) vs. Efficiency (η) OUT 100 0.01 0 [mA] OUT (3-c) Output current (I ) vs. Ripple voltage (Vr) OUT 100 = 0.01 0 OUT Figure 29 Ceramic Capacitor Circuit Output Characteristics (3-b) Output current (I =0 ...

Page 36

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series Example of Major Temperature Characteristics ( − − − − 85° ° ° ° vs 3 SS1 OUT SS1 [µ −40 − [° ...

Page 37

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 SSS OUT 1.0 0.8 0.6 I SSS [µA] 0.4 0.2 0.0 −40 − [°C] = 3.3 V EXTH OUT −60 −50 −40 I EXTH −30 [mA] −20 − −40 − [° osc ...

Page 38

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series MaxDuty vs OUT 90 85 MaxDuty 80 [%] 75 70 −40 − [°C] MaxDuty vs OUT 90 85 MaxDuty 80 [%] 75 70 −40 − [°C] PFMDuty vs OUT S-8356/58 Series 25 20 PFMDuty 15 [%] 10 5 −40 − ...

Page 39

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 OUT [ms −40 − [° OUT [ms −40 − [° ST1 ...

Page 40

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series OUT a OUT 3.40 3.35 V OUT 3.30 [V] 3.25 3.20 −40 − [° 600 kHz) OSC 100 Seiko Instruments Inc. Rev.4.1 _00 ...

Page 41

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 Example of Major Power Supply Dependence Characteristics ( 25° ° ° ° 3 vs SS1,2 DD OUT SS1,2 [µ SSS DD OUT 1 ...

Page 42

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series MaxDuty vs. V 100 90 80 MaxDuty 70 [%] MaxDuty vs. V 100 90 80 MaxDuty 70 [%] vs. V EXTH DD −100 −80 −60 I EXTH [mA] −40 − ...

Page 43

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 V vs. V OUT 3 600 kHz, V OUT OSC OUT 3.5 3.0 V OUT 2.5 [V] 2.0 1 separate type [V] Seiko Instruments Inc. S-8355/56/57/58 Series 43 ...

Page 44

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series Output Waveforms 1. S-8358B33MC = 1 mA 1-1. I OUT Output voltage [0.05 V/div] 4 CONT 2 voltage 0 [2.0 V/div] − 25 − 20 − 15 − 10 − Time [ µ 100 mA 1-3. I OUT Output voltage [0.05 V/div] 4 CONT 2 voltage 0 [2.0 V/div] −25 −20 −15 −10 −5 0 Time [µ ...

Page 45

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 3. S-8358N33MC = 1 mA 3-1. I OUT Output voltage [0.05 V/div] 4 CONT 2 voltage [2.0 V/div] 0 −5 −4 −3 −2 −1 0 Time [µs] = 100 mA 3-3. I OUT Output voltage [0.05 V/div] 4 CONT 2 voltage [2.0 V/div] 0 −5 −4 −3 −2 −1 0 Time [µ ...

Page 46

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series Examples of Transient Response characteristics : 0 V → 2 Powering 1-1. 100 kHz, I OUT [V] 0 − time [ms 1-3. 300 kHz, I OUT [V] 0 − ...

Page 47

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 2. Responses of shutdown pin ( 2-1. 100 kHz, I OUT 2 V ON/OFF [V] 0 − time [ms 2-3. 300 kHz, I OUT 2 V ON/OFF [V] 0 − time [ms 2-5. 600 kHz, I OUT ...

Page 48

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series 3. Load fluctuations : 100 µA → 100 mA 3-1. 100 kHz, I OUT I OUT 100 mA 100 µA V OUT [0.2 V/div] −0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 time [ms] 3-3. 300 kHz 100 µA → 100 mA OUT I OUT 100 mA 100 µA V OUT [0.2 V/div] − ...

Page 49

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 4. Input voltage fluctuations = 100 mA, V 4-1. 100 kHz, I OUT IN 3.0 V 2.5 IN [V] 2.0 1.5 −0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 time [ms] = 100 mA, V 4-3. 300 kHz, I OUT IN 3.0 V 2.5 IN [V] 2.0 1.5 −0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 time [ms] = 100 mA, V 4-5. 600 kHz, I OUT IN 3.0 V 2.5 IN [V] 2.0 1.5 −0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 time [ms] = 1.98 V → ...

Page 50

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series Reference Data Use this reference data to choose the external parts. This reference data makes it possible to choose the recommended external part based on the application and characteristics data. 1. Reference data for external parts Table 28 Efficiency vs ...

Page 51

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 2. Reference data (1) The data of (a) output current (I voltage (V ) characteristics under conditions of (1) to (16) shown in Table 28 is shown below. OUT (1) S-8357F33 (a) Output current (I ) vs. Efficiency (η) OUT 100 ...

Page 52

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series (4) S-8357B33 (a) Output current (I ) vs. Efficiency (η) OUT 100 0 [mA] OUT (5) S-8358B33 (a) Output current (I ) vs. Efficiency (η) OUT 100 0 [mA] OUT (6) S-8357B50 (a) Output current (I ) vs. Efficiency (η ...

Page 53

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 (8) S-8357B33 (a) Output current (I ) vs. Efficiency (η) OUT 100 0 [mA] OUT (9) S-8358B33 (a) Output current (I ) vs. Efficiency (η) OUT 100 0 [mA] OUT (10) S-8357B50 (a) Output current (I ) vs. Efficiency (η ...

Page 54

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series (12) S-8356M50 (a) Output current (I ) vs. Efficiency (η) OUT 100 0 [mA] OUT (13) S-8357N33 (a) Output current (I ) vs. Efficiency (η) OUT 100 0 [mA] OUT (14) S-8357N50 (a) Output current (I ) vs. Efficiency (η ...

Page 55

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 (16) S-8356Q50 (a) Output current (I ) vs. Efficiency (η) OUT 100 0 [mA] OUT (b) Output current (I 5.2 5.1 5.0 4 4.7 0.1 100 1000 Seiko Instruments Inc. S-8355/56/57/58 Series ) vs. Output voltage (V ) OUT OUT ...

Page 56

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR S-8355/56/57/58 Series 3. Reference data (2) The actual output current vs. ripple voltage characteristics data under conditions of (1) to (16) in Table 28 are shown below. (1) S-8357F33 150 2.7 V 100 0 [mA] ...

Page 57

... SUPER-SMALL PACKAGE PWM CONTROL, PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Rev.4.1 _00 (9) S-8358B33 150 2.7 V 100 0 [mA] OUT (11) S-8357F33 150 2.7 V 100 0 [mA] OUT (13) S-8357N33 100 ...

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... Seiko Instruments Inc. is strictly prohibited. • The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc. ...

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