ISL6121_14 Datasheet, PDF (2/11 Pages) Intersil Corporation – Single Supply Integrated Current Limiting Controller

Simplified Block Diagram
ISL6121
GND
OUT
VIN
POR
Q-PUMP
VIN
CURRENT AND TEMP.
MONITORING, GATE AND
OUTPUT CONTROL
LOGIC
OUT
OUT
EN
LOGIC
FAULT
Pin Descriptions
PIN # SYMBOL
FUNCTION
DESCRIPTION
1
GND
IC GND Reference
2, 3
VIN
Chip Bias, Controlled
VIN provides chip bias voltage. At VIN < 2.5V chip functionality is disabled, FAULT latch
Supply Input, Undervoltage is cleared and floating. OUT is pulled and held low.
Lock-Out
4
ENABLE / Enable / Enable Not Input Enables chip when VIN and ENABLE > 2.5V or ENABLE < 0.6V
ENABLE
5
FAULT Over Current Fault Indicator Overcurrent fault indicator. FAULT is disabled for 12ms after turn-on. This output is pulled
low to GND after the current limit time-out period has expired and stays latched until
ENABLE is deasserted.
6, 7, 8
VOUT
Controlled Supply Output
Voltage output, connect to load to protect. Upon an overcurrent condition VOUT is current
limited to 2A. Current limit response time is within 200µS. This output will remain in current
limit for approximately 12ms before being latched off.
2
FN9004.2
November 12, 2004