參數(shù)資料
型號(hào): LOAD
英文描述: Load Balance Controller. EZ1900 and Low-Dropout Regulators (35k)
中文描述: 負(fù)載平衡控制器。 EZ1900和低壓差穩(wěn)壓器(為35K)
文件頁(yè)數(shù): 3/3頁(yè)
文件大小: 36K
代理商: LOAD
AN96-5
Load Balance Controller, EZ1900 and
LP2951 + StP8 Regulator
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
August 28, 2000
3
combination regulator to construct a flexible circuit which will automatically supply the correct voltages for powering
single or split voltage plane processors. The circuit is low cost, eliminating costly production changes and jumpers
to set different supply voltage requirements for alternative processor options.
Table 2: Resistor Values
Mode
(SEL Pin)
Processor
V
(Volts)
3.6V
(1)
V
(Volts)
R
4
(k
)
27.4
R
11
(k
)
28.7
OPEN
VRE
3.49V
OPEN
STD/VR
3.6V
(1)
3.384V
26.1
28.7
LOW
P55C
AMD5
K
86
6x86
AMD5
K
86
3.3V
2.8V
19.1
24.9
LOW
3.3V
2.5V
15.4
24.9
(1) Although the V
I/O
setpoint is at 3.6V, the EZ1900 adjusts the slave output downwards to achieve load current
balance. V
CC2
and V
I/O
must be connected.
R
4
& R
11
are both 1% tolerance. R
13
= R
8
= 15k
Fig 2: Resistor Layout Example
Vin PLANE
R15
R14
Q2 Emitter PLANE
Q3 Emitter PLANE
Pin2
Pin3
U2
1200A
2
/oz.in rating per Table 1:
8A per side
1oz copper.
40
o
C rise in traces
SHOWN FULL SIZE
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