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IS42S16160D-6BL , 32Meg x 8, 16Meg x16 256-MBIT SYNCHRONOUS DRAM
IS42S16160D-6T , 32Meg x 8, 16Meg x16 256-MBIT SYNCHRONOUS DRAM
IS42S16160D-6TI , 32Meg x 8, 16Meg x16 256-MBIT SYNCHRONOUS DRAM
IS42S16160D-6TL , 32Meg x 8, 16Meg x16 256-MBIT SYNCHRONOUS DRAM
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IS42S16160D-75ETLI , 32Meg x 8, 16Meg x16 256-MBIT SYNCHRONOUS DRAM
IR3503M
A full featured and flexible way to implement a complete VR11.0 and VR11.1 power solution.
International
TOR Rectifier IR3503
DATA SHEET
XPHASEaTM CONTROL IC
DESCRIPTION
The lR3503 control IC combined with an XPHASE3TM Phase IC provides a full featured and flexible way to
implement a complete VR11.0 and VR11.1 power solution. The IR3503 provides overall system control
and interfaces with any number of Phase ICs, each driving and monitoring a single phase. The XPhase3TM
architecture results in a power supply that is smaller, less expensive, and easier to design while providing
higher efficiency than conventional approaches.
FEATURES
1 to X phase operation with matching Phase IC
0.5% overall system set point accuracy
Daisy-chain digital phase timing provides accurate phase interleaving without external components
Programmable 250kHz to 9MHz clock oscillator frequency provides per phase switching frequency
of 250kHz to 1.5MHz
Programmable Dynamic VID Slew Rate
Programmable VID Offset or No Offset
Programmable Load Line Output Impedance
High speed error amplifier with wide bandwidth of 30MHz and fast slew rate of 1OV/us
Programmable constant converter output current limit during soft start
Hiccup over current protection with delay during normal operation
Central over voltage detection and latch with programmable threshold and communication to phase
Over voltage signal output to system with overvoltage detection during powerup and normal
operation
Load current reporting capable of interfacing directly to the CPU
Single NTC thermistor compensation for correct current reporting, OC Threshold, and Droop
Detection and protection of open remote sense line
Open control loop protection
Programmable VRHOT function monitors temperature of power stage through a NTC thermistor
Remote sense amplifier with true converter voltage sensing
Simplified VR Ready (VRRDY) output provides indication of proper operation
Small thermally enhanced 32L 5mm x 5mm MLPQ package
RoHS Compliant
ORDERING INFORMATION
Device Package Order Quantity
IR3503MTRPBF 32 Lead MLPQ
(5 x 5 mm body) 3000 per reel
32 Lead MLPQ
* IR3503MPBF (5 x 5 mm body)
100 piece strips
Samples only
Page 1 of 39 February 12, 2010
International
TOR Rectifier IF13503
APPLICATION CIRCUIT
+12V > < 12V
Psw PSI#
VRRDY SHIFT
IOUT IIN
VOSEN-
PHSOUT
CLKOUT
VI D7 I PSI# ROSC
VI De ROSC
CSS/DEL
VI D5 SSID EL
RVDAC CVDAC
VI D4 VID4 VDAC
IR3 503 RSETPT
VI D3 VID3 VSETPT VDAC
VI D2 VDAC_BUFF
VI D1 VN
VI D0 m r- + VDRP
t' , E g RTCMP1
a O O <
UI I > LLI
ENABLE RDRP RTCMP2
RHOTSET1
RHOTSET3
CHOTSET
RHOTSET2
VOSEN+
VOSEN-
Note: Pin 33 of IR3503 is the exposed pad located under the IC. It is connected to IC ground
Figure 1: IR3503 Application Circuit
Page 2 of 39 February 12, 2010
