ISL6121 Datasheet, PDF (3/16 Pages) Intersil Corporation – Single Supply Integrated Current Limiting Controller

ISL6123, ISL6124, ISL6125, ISL6126, ISL6127, ISL6128
Pin Descriptions (Continued)
PIN # PIN NAME
FUNCTION
2
GATE_A FET Gate Drive
Output
5
GATE_B _{ISL6125 Open}
6
GATE_C ^{Drain Outputs}
7
GATE_D
22 SYSRST# System Reset I/O
19 No Connect No Connect
DESCRIPTION
Drives the external FETs with a 1µA current source to soft start ramp into the load.
On the ISL6125 only, these are open drain outputs that can be pulled up to a maximum of VDD
voltage.
As an input, allows for immediate and unconditional latch-off of all GATE outputs when driven low. This
input can also be used to initiate the programmed sequence with ‘zero’ wait (no 10ms stabilization delay)
from input signal on this pin being driven high to first GATE. As an output when there is a UV condition this
pin pull low. If common to other SYSRST# pins in a multiple IC configuration it will cause immediate and
unconditional latch-off of all other GATEs on all other ISL612X sequencers. This pin is a NC on ISL6126
and ISL6128
No Connect
ISL612X Variant Feature Matrix
PART
NAME
EN/EN#
CMOS/
TTL
NUMBER OF
NUMBER OF CHANNELS
UVLO
THAT
GATE DRIVE REQUIRED INPUTS TURN-OFF
OR OPEN CONDITIONS MONITORED WHEN 1
DRAIN FOR INITIAL BY EACH
UVLO
OUTPUTS START-UP RESET#
FAULTS
PRESET OR
ADJUSTABLE
SEQUENCE
NUMBER OF
UVLO AND
PAIRS OF I/O
FEATURES
ISL6123 EN
TTL Gate Drive
4 UVLO
1 EN
4 UVLO
4 Gates
Adjustable On & 4 Monitors with Auto restart
Off
1 I/O
ISL6124 EN# CMOS Gate Drive
4UVLO
1 EN
4 UVLO
4 Gates
Adjustable On & 4 Monitors with Auto restart
Off
1 I/O
ISL6125 EN#
CMO Open Drain
4 UVLO
1 EN
4 UVLO
4 Open Drain Adjustable On & 4 Monitors with Auto restart
Off
1 I/O
ISL6126 EN# CMOS Gate Drive
1 UVLO
1 EN
4 UVLO
1 Gate
Adjustable Off 4 Monitors with Gates independent
1 I/O
on as UVLO Valid
ISL6127 EN# CMOS Gate Drive
4 UVLO
1 EN
4 UVLO
4 Gates
Preset
4 Monitors with Auto restart
1 I/O
ISL6128 EN# CMOS Gate Drive
4 UVLO
2 EN
2 UVLO
2 Gates
Preset
2 Monitors Dual Redundant
with 2 I/O Operation
3
FN9005.4
June 10, 2005