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EZ1900CS 데이터시트 PDF




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부품번호 EZ1900CS 기능
기능 REGULATOR BALANCE CONTROLLER
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EZ1900CS 데이터시트, 핀배열, 회로
REGULATOR
BALANCE CONTROLLER
EZ1900
May 27, 1999
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The EZ1900 is a high performance positive load cur-
rent balancer designed for use in applications utiliz-
ing 2 regulators in parallel to achieve equal current
sharing or identical current for each load. The regula-
tor balance controller allows a flexible motherboard
design to be made to cope with different processor
configurations. The controller reads a logic level up-
grade signal (denoted VCC2DET on the Intel P55C; sim-
ilar on AMD, Cyrix and PowerPC microprocessors) to
control the output voltage of two linear low dropout
voltage regulators to the CPU core and I/O planes. In
single-voltage plane configurations (VCC2DET floating),
both regulators are set to the same output voltage
(usually 3.3 - 3.5V) and are configured in master-
slave mode. For split plane processors (VCC2DET low),
the outputs of the two regulators are switched - the
core voltage will be set to a nominal 2.5V while the
I/O voltage will remain at 3.3V. The actual output
voltages can be adjusted by means of resistors. The
EZ1900 programmable current balancer is available
in the popular SO-8 surface mount package.
PIN CONFIGURATION
Pin # Legend
Description
1 Sel Non-slave mode, voltage select
2 -IN Negative error amplifier input
3 +IN Positive error amplifier input
4 -V Power input, common
5 nc No Connection
6 SOUT Sets VOUT of slave device
7 +V Power input, positive
8 nc No connection
Slave Mode Pin: For non “Computer Select Operation”, the Select
Mode, pin #1, can be left open circuited for continuous slave mode
operation or balance current control. Ground the Select Mode, pin #1,
for non-slave mode operation.
FEATURES
Current balance controller for regulators in parallel
Slave and non-slave voltage modes
Slave or non-slave mode computer selected
Compatible with 3 or 5 pin low drop regulators
Remote sense operation
SO-8 package
APPLICATIONS
Flexible upgrade from single voltage plane to
split-plane processors
Intel Pentium® Processor P54CS & P55C
upgrades
PowerPC™ 603 & 604 upgrades
AMD5K86™ upgrades
ORDERING INFORMATION
DEVICE(1)
PACKAGE
EZ1900CS
SO-8
Note:
(1) Add suffix ‘TR’ for tape and reel.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum Units
Input Voltage Supply
Differential
Amplifier
Slave Output Current
(sink only)
VIN
-IN, +IN
SOUT
ISLAVE
7
7
0 to +V
50
Thermal Resistance
Junction to Ambient
θJA
160
Operating Junction
Temperature Range
TJ
0 to 70
Storage
Temperature Range
TSTG -65 to 125
Lead Temperature
(Soldering) 5 Sec
TLEAD
260
V
V
mA
°C/W
°C
°C
°C
© 1999 SEMTECH CORP.
Pentium Processor is a trademark of Intel Corp. PowerPC is a trademark of IBM Corp. AMD5K86 is a trademark of Advanced Micro Devices.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320




EZ1900CS pdf, 반도체, 판매, 대치품
REGULATOR
BALANCE CONTROLLER
May 27, 1999
TYPICAL APPLICATIONS (cont.)
Balanced Current Controller Utilizing EZ1087 Series
EZ1900
Voltage Select
Slave Mode Operation VM = VOUT of Master
VM = VREF (1 + R4/R3) + IADJ R4
Non-Slave Mode, VS = VOUT of Slave
VS = VREF (1 + (R2 + 3) / R1) + IADJ (R2 + 3)
RSENSE Select
RSENSE Select; Typical selection can be
(50mV to 100mV) / (Total IOUT / 2).
Trace resistance of 10mand above can easily accomodate value
required.
Balanced Current Controller Utilizing EZ1580 Series
Voltage Select
Slave Mode Operation VM = VOUT of Master
VM = VREF (1 + R4/R3) + IADJ R4
Non-Slave Mode, VS = VOUT of Slave
VS = VREF (1 + (R2 + 3) / R1) + IADJ (R2 + 3)
© 1999 SEMTECH CORP.
RSENSE Select
RSENSE Select (100mV Min) / (Total IOUT / 2)
The EZ1580 series requires RSENSE voltage to be less than 100mV.
Trace resistance can easily accomodate value required.
4
652 MITCHELL ROAD NEWBURY PARK CA 91320

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부품번호상세설명 및 기능제조사
EZ1900CS

REGULATOR BALANCE CONTROLLER

Semtech Corporation
Semtech Corporation

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