Datasheet

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Setup

Test Points:

• VBAT Power Input

• VIN_D, VIN Power Input after the reverse battery protection diode.

• IGN Ignition, monitors if IGN-input is high, powering up the device.

• IGN_EN Ignition enable (IGN after series resistor).

• BOOT_LDO Voltage at internal regulator, which supplies the power to charge the flying boot

capacitor.

• VREG Regulated output of switch-mode converter, supplying 5.3V.

• DELAY Input for reset delay.

• SS Input for soft start time.

• EN Enable pin, if high, the device remains active after IGN is transitioning to low.

• GND (x7) Ground

• PH Switch node, source of internal switching FET.

• nRST Reset output for Switcher, asserted high after VREG, 3.3V and 1.2V regulator

outputs are regulating and delay timer has expired.

• 3.3V 3.3V - Linear regulator output

• 3.3VDRIVE Base drive for external 3.3V-regulator bipolar transistor.

• 1.2V 1.2V - Linear regulator output.

• 1.2VDRIVE Base drive for external 1.2V-regulator bipolar transistor.

• VSENSE Inverting node of error amplifier for voltage mode control of VREG.

• IGN_ST Ignition input indicator. Asserted high while ignition input is high.

• 5V Output of the 5V linear regulator. Since no screw-terminal is provided for this

output, use the test-point to attach a load.

SLVU685–February 2012 TPS65300EVM

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