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IR3531 Datasheet(PDF) 6 Page - International Rectifier

Part # IR3531
Description  Sink and source tracking capability
PDF  39 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR3531 Datasheet(HTML) 6 Page - International Rectifier

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4+1 Phase Dual Output Control IC
IR3531
March 22, 2012 | FINAL | V2.27
6
PIN #
PIN NAME
PIN DESCRIPTION
30
ICCP
Program maximum load current for both Rail0 and Rail1.
31
ADDR
Programs SVID address for Rail0 and Rail1, discrete or coupled inductor operation for Rail0,
enable/disable turbo function for Rail0.
32
ROSC/OVP
Connect a resistor to LGND to program oscillator frequency. Oscillator frequency equals switching
frequency per phase. ROSC/OVP pin is pulled up to VCC when an over voltage event occurs.
33
TSENS
Pin for thermal network that senses the temperature of Rail0 and Rail1.
36
BBR1#
Body-braking
TM bus for Rail1 driver ICs to disable synchronous switches.
39
TRACK1
External tracking reference for Rail1.
40
VOSEN1-
Rail1 remote sense amplifier input. Connect to ground at the load.
41
VOSEN1+
Rail1 remote sense amplifier input. Connect to output at the load.
42
VO1
Remote sense amplifier output for Rail1.
43
FB1
Inverting input to the Error Amplifier for Rail1.
44
EA1
Output of the error amplifier for Rail1.
45
VDRP1
Buffered, scaled and thermally compensated current signal for Rail1. Connect an external resistor
to FB1 to program converter output impedance.
46
VDAC1
Buffered Rail1 reference voltage. Voltage can be margined via SVID.
47
IIN_R1
Current signal from Rail1 driver IC.
48
PWM_R1
PWM output for Rail1.
49
GND
Local Ground for internal circuitry and IC substrate connection.



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