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参数资料
| 型号： | FAN5056V90M |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封装： | SOIC-24 |
| 文件页数： | 14/19页 |
| 文件大小： | 266K |
| 代理商： | FAN5056V90M |
FAN5056V85/FAN5056V90
4
REV. 0.8.0 1/31/01
Pr
eliminar
y
Specication
Notes:
1. Steady State Voltage Regulation includes Initial Voltage Setpoint, Droop, Output Ripple and Output Temperature Drift and is
measured at the converter’s VFB sense point.
2. As measured at the converter’s VFB sense point. For motherboard applications, the PCB layout should exhibit no more than
0.5m
trace resistance between the converter’s output capacitors and the CPU. Remote sensing should be used for optimal
performance.
3. Using the VFB pin for remote sensing of the converter’s output at the load, and the appropriate droop, the converter will be
in compliance with Intel’s VRM 8.5 (FAN5056V85) or VRM9.0 (FAN5056V90) specification. If Intel specifications on maximum
plane resistance from the converter’s output capacitors to the CPU are met, the specifications at the capacitors will also be
met.
4. PWRGD will be high only if BOTH the linears and the switcher conditions are met. PWRGD will be low if EITHER condition is met.
Total Output Variation, Transient2
ILOAD = 0.8A to Imax, VVID = 1.550V3
1.425
1.635
V
Short Circuit Detect Current
45
50
60
A
Efficiency
ILOAD = 18A, VVID = 1.550V
85
%
Output Driver Rise & Fall Time
See Figure 3
50
nsec
Output Driver Deadtime
See Figure 3
50
nsec
Duty Cycle
0
100
%
5V UVLO
3.76
4
4.24
V
12V UVLO
7.99
8.5
9.01
V
Adjustable Linear Regulator
Output Voltage
ILOAD ≤ 2A
1.164
1.2
1.236
V
Over Current Trip Level
80
%VO
VCLK Linear Regulator
Output Voltage
ILOAD ≤ 2A
2.375
2.5
2.625
V
Over Current Trip Level
80
%VO
VAGP Linear Regulator
Output Voltage
ILOAD ≤ 2A, TYPEDET = 0V
1.425
1.5
1.575
V
Output Voltage
ILOAD ≤ 2A, TYPEDET = OPEN
3.135
3.3
3.465
V
Over Current Trip Level
80
%VO
Common Functions
Oscillator Frequency
255
300
345
kHz
PWRGD Threshold4 Switcher
Logic HIGH [VVID + 85mV]
Logic LOW [VVID–155mV]
88
84
112
116
%
PWRGD Delay Switcher
HIGH
→ LOW
6
sec
PWRGD Hysteresis Switcher
25
mV
PWRGD Threshold4 Linear
Regulators
Logic HIGH, All Outputs
Logic LOW, All Outputs
92
88
108
112
%Vout
Linear Regulator Over Current Trip
Level
VVCKIN–VILIM
100
mV
Electrical Specications (Continued)
(VCCA = 5V, VCCP = 12V, VOUT = 1.550V, and TA = +25°C using circuits in Figures 1-2, unless otherwise noted.)
The denotes specications which apply over the full operating temperature range.
Parameter
Conditions
Min.
Typ.
Max.
Units
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