SIP32433

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Vishay Siliconix

E22-0335. A, 15-Aug-2022

17

Document Number: 63175

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True Reverse Current Blocking

The Ilimit / Imon pin can also be used for current reporting. The

output path should be of high impedance, to prevent any

disruption to the current limit circuitry. 0.6 V output reflect

2 A current; 0.3 V represents 1 A.

The SIP32433A and SIP32433B feature TRCB (true reverse

current blocking). When VOUT is detected higher than VIN by

VRCB (20 mV typ.) the switch is turned off. The TRCB

response time tRCB is 300 ns (VOUT – VIN = 100 mV) and 3 μs

(VOUT – VIN = 3 mV. TRCB is a non-latchable fault. Once VOUT

falls below the TRCB recovery threshold (VRCBR 20 mV

typically), the switch will turn on without soft start

procedure. The SIP32419B also blocks the current from

VOUT to VIN when VIN is short to GND. When the switch is

disabled, current flow is blocked in both directions.

Fig. 40 - Reverse Protection

Fig. 41 - Reverse Protection

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OTP, OVER-TEMPERATURE PROTECTION

Over-temperature protection turns off the power switch when the die temperature reaches the OTP threshold of 165 °C. The

hysteresis is 45 °C. When the die temperature drops below 120 °C, it is allowed to turn on again.

PGD, POWER GOOD REPORTING

PGD is an open drain output. A pull-up resistor must be connected pulling to 3 V or 5 V. It is asserted low when VOUT is below

95 % of VIN, or an over-current, over-voltage, or over-temperature fault condition occurs.

INPUT CAPACITOR

While bypass capacitors at the input pins are not required, a 2.2 μF or larger capacitors for CIN is recommended in almost all

applications. The bypass capacitors should be placed as physically close to the device’s input pins and ground to be effective

to minimize transients on the input. Ceramic capacitors are recommended over tantalum because of their ability to withstand

input current surges from low impedance sources such as batteries. For hot-plug applications, where input path inductance is

negligible, this input capacitor can be minimized or eliminated.

OUTPUT CAPACITOR

The SIP32433A and SIP32433B do not require an output capacitor for proper operation. A proper value COUT is recommended

to accommodate load transient per circuit design requirements. There are no ESR or capacitor type requirements.

Protection

VOUT

VIN

ISW

FLG

Reverse Voltage

EN/ UVLO

VIN

Switch ON

VIN Rem oved

0A

VRCB

VRCBR

When VIN i s r emoved

, switch

rema ins off r ega rdless of EN

FLG remains high on this event

V

RCB

V

OUT

V

IN

t

RCB

V

OUT

V

IN

V

RCBR

V

OUT