SI91872DMP-33-T1 Vishay, SI91872DMP-33-T1 Datasheet

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SI91872DMP-33-T1

Manufacturer Part Number
SI91872DMP-33-T1
Description
IC, LDO REGULATOR, 3.3V, 0.3A, MLP33-5
Manufacturer
Vishay
Datasheet

Specifications of SI91872DMP-33-T1

Primary Input Voltage
4V
Output Voltage Fixed
3.3V
Dropout Voltage Vdo
300mV
No. Of Outputs
1
No. Of Pins
5
Output Current
300mA
Operating Temperature Range
-40°C To +85°C
Number Of Outputs
1
Polarity
Positive
Input Voltage Max
6 V
Output Voltage
3.3 V
Output Type
Fixed
Dropout Voltage (max)
0.08 V at 50 mA
Line Regulation
20 mV
Load Regulation
25 mV
Voltage Regulation Accuracy
2 %
Maximum Power Dissipation
2.3 W
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
MLP33-5
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
DESCRIPTION
The Si91872 is a 300-mA CMOS LDO (low dropout) voltage
regulator. It is the perfect choice for low voltage, low power
applications. An ultra low ground current and ultra fast turn-on
make this part attractive for battery operated power systems.
The Si91872 also offers ultra low dropout voltage to prolong
battery life in portable electronics. Systems requiring a quiet
voltage source will benefit from the Si91872’s low output noise.
The Si91872 is designed to maintain regulation while
delivering 400-mA peak current, making it ideal for systems
that have a high surge current upon turn-on.
For better transient response and regulation, an active
pull-down circuit is built into the Si91872 to clamp the output
Document Number: 72013
S-51147—Rev. F, 20-Jun-05
FEATURES
D Ultra Low Dropout—300 mV at 300-mA Load
D Low Noise—75 mV
D Out-of-Regulation Error Flag (power good)
D Shutdown Control
D 130-mA Ground Current at 300-mA Load
D Fast Start-Up (50 mS)
D 1.5% Guaranteed Output Voltage Accuracy
D 400-mA Peak Output Current Capability
D Uses Low ESR Ceramic Capacitors
D Fast Line and Load Transient Response (v 30 ms)
D 1-mA Maximum Shutdown Current
D Output Current Limit
D Reverse Battery Protection
D Built-in Short Circuit and Thermal Protection
TYPICAL APPLICATION CIRCUIT
RMS
(10-Hz to 100-kHz)
With Error Flag and Discharge Option
V
SD
IN
300-mA Low-Noise LDO Regulator
2.2 mF
V
SD
GND
IN
MLP33-5
Si91872
Available
ERROR
V
OUT
voltage when it rises beyond normal regulation. The Si91872
automatically discharges the output voltage by connecting the
output to ground through a 100-W n-channel MOSFET when
the device is put in shutdown mode.
The Si91872 features reverse battery protection to limit
reverse current flow to approximately 1-mA in the event
reversed battery is applied at the input, thus preventing
damage to the IC.
The Si91872 is available in both the standard and
lead (Pb)-free 5-pin MLP33 PowerPAK packages and is
specified to operate over the industrial temperature range of
−40_C to 85_.
D Output—Auto-Discharge In Shutdown Mode
D Fixed 1.2, 1.8, 2.5, 2.6, 2.8, 3.0, 3.3, 5.0-V Output
D MLP33-5 PowerPAKr Package
APPLICATIONS
D Cellular Phones, Wireless Handsets
D Noise-Sensitive Electronic Systems, Laptop and
D PDAs
D Pagers
D Digital Cameras
D MP3 Player
D Wireless Modem
Voltage Options
Palmtop Computers
51 kW
2.2 mF
V
ERROR
OUT
Vishay Siliconix
Si91872
www.vishay.com
1

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SI91872DMP-33-T1 Summary of contents

Page 1

... IC. The Si91872 is available in both the standard and lead (Pb)-free 5-pin MLP33 PowerPAK packages and is specified to operate over the industrial temperature range of −40_C to 85_. Si91872 OUT 2 GND ERROR MLP33-5 Si91872 Vishay Siliconix V OUT 2 ERROR www.vishay.com 1 ...

Page 2

... Si91872 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings Input Voltage GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (See Detailed Description ERROR SD Output Current OUT Output Voltage OUT b Package Power Dissipation Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied ...

Page 3

... V Below OUT OUT(nom Falling mA OUT OUT OUT(nom OUT(nom 0.95 V NOM V OUT FIGURE 1. Timing Diagram for Power-Up Si91872 Vishay Siliconix Limits −40 to 85_C Min Typ Max Unit Temp Temp Room 60 Room 40 dB Room 30 Room Room 25 Room 150 _C C Room 20 Room 1 mA Room ...

Page 4

... Output voltage. Connect C OUT 5 GND Ground pin. For better thermal capability, directly connected to large ground plane Standard Part Number Si91872DMP-12-T1 Si91872DMP-18-T1 Si91872DMP-25-T1 Si91872DMP-26-T1 Si91872DMP-28-T1 Si91872DMP-30-T1 Si91872DMP-33-T1 Si91872DMP-50-T1 www.vishay.com 4 MLP33-5 PowerPAK GND GND 5 GND GND Function between this pin and ground. OUT ...

Page 5

... Si91872 Vishay Siliconix Normalized V vs. Temperature OUT 0 OUT(nom) 0 OUT I OUT I OUT I = 300 mA OUT −40 − Ambient Temperature (_C) No Load GND Pin Current vs ...

Page 6

... Si91872 Vishay Siliconix TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED) Dropout Voltage vs. Load Current 350 V = 3.0 V OUT 300 250 200 150 100 120 180 I LOAD (mA) Dropout Voltage vs. Temperature 350 V = 3.0 V OUT 300 I = 300 mA OUT 250 200 I = 150 mA 150 OUT 100 OUT ...

Page 7

... LineTransient Response-1 V OUT 10 mV/div V/div 20 ms/div INSTEP OUT OUT 150 mA LOAD msec rise Document Number: 72013 S-51147—Rev. F, 20-Jun-05 Vishay Siliconix Load Transient Response-2 V OUT 10 mV/div I LOAD 100 mA/div 20 ms/div V = 3.0 V OUT OUT I = 150 LOAD msec fall LineTransient Respons-2 V OUT 10 mV/div V/div ...

Page 8

... Si91872 Vishay Siliconix TYPICAL WAVEFORMS Output Noise V OUT 200 mV/div 4 ms/div OUT I = 150 mA OUT 100 kHz FUNCTIONAL BLOCK DIAGRAM Reverse Polarity V IN Protection Reference Shutdown SD Control www.vishay.com 0.01 Si91872 − + Thermal Sensor Current Limit Noise Spectrum OUT I = 150 mA LOAD V OUT ERROR ...

Page 9

... Junction temperature is in turn dependent on power dissipation in the pass device, the thermal resistance of the Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. http://www.vishay.com/ppg?72013. ...

Page 10

... Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’ ...

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