S-8533A15AFT-TB-G Seiko Instruments, S-8533A15AFT-TB-G Datasheet - Page 15

• Manufacturer Part Number: S-8533A15AFT-TB-G
• Description: IC CTRL PWM SYNC SD 1.5V 8-TSSOP
• Manufacturer: Seiko Instruments
• Type: Step-Down (Buck)r

Specifications of S-8533A15AFT-TB-G

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.5V
• Frequency - Switching: 300kHz
• Voltage - Input: 2.7 ~ 16 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP
• Power - Output: 300mW
• Output Voltage: + 1.3 V to + 6 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Rev.3.0
STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER
Precautions
• Install the external capacitors, diode, coil, and other peripheral parts as close to the IC as possible, and make a one-
• Normally, the P-channel and N-channel MOS FETs do not turn ON at the same time. However, if the external P-
• Characteristics ripple voltage and spike noise occur in IC containing switching regulators. Moreover rush current flows
• If the input voltage is high and output current is low, pulses with a low duty ratio may be output, and then the duty ratio
• The PDRV and NDRV oscillation frequencies may be an integer fraction of 300 kHz at some input voltage and load
• The through current prevention circuit reduces through current by shifting the P-channel and N-channel transistor on
• Since PWM synchronous rectification is performed even when the load is light, current flows back to V
• The PDRV or NDRV oscillation frequency may vary in a voltage range, depending on input voltage.
• When decreasing the power supply voltage slowly, the IC operation may be undefined if the voltage falls below the
• Make sure that dissipation of the switching transistor especially at high temperature will not surpass the power
• Switching regulator performance varies depending on the design of PCB patterns, peripheral circuits and parts.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
• SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including
point grounding.
channel MOS FET has much different characteristics (input capacitance, V
FET, they may turn ON at the same time, flowing a through current. Select P-channel and N-channel transistors with
similar characteristics.
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.
may be 0% for several clocks.
conditions. In this case, the ripple voltage may increase.
timing. It does not suppress the through current in the external transistors completely.
whether the back-flow occurs and whether it affects the performance.
Operation”.)
minimum operating voltage.
dissipation of the package.
Thoroughly evaluate the actual device when setting. When using parts other than those which are recommended,
contact the SII marketing department.
protection circuit.
this IC of patents owned by a third party.
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Seiko Instruments Inc.
th
, etc.) from the external N-channel MOS
(See “5. Back-Flow Current” in “
S-8533 Series
IN
. Check
15