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FAN5071 数据表(PDF) 4 Page - Fairchild Semiconductor

部件名 FAN5071
功能描述  High Performance Programmable Synchronous DC-DC Controller for Multi-Voltage Platforms
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

FAN5071 数据表(HTML) 4 Page - Fairchild Semiconductor

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FAN5071
4
REV. 1.0.4 1/29/02
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
Ω 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 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.
Adjustable Linear Regulator
Output Voltage
ILOAD ≤ 2A
1.188
1.212
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
80
112
120
%
PWRGD Delay Switcher
HIGH
→ LOW
6
µsec
PWRGD Hysteresis Switcher
25
mV
PWRGD Threshold4 Linear
Regulators
All Outputs
80
%Vout
Electrical Specifications (Continued)
(VCCA = 5V, VCCP = 12V, VOUT = 1.425V, and TA = +25°C using circuits in Figure 1, unless otherwise noted.)
The • denotes specifications which apply over the full operating temperature range.
Parameter
Conditions
Min.
Typ.
Max. Units


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