FAN5071 View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
FAN5071
Fairchild Semiconductor
FAN5071 Datasheet PDF : 15 Pages
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FAN5071
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
Adjustable Linear Regulator
Output Voltage
Over Current Trip Level
VCLK Linear Regulator
Output Voltage
Over Current Trip Level
VAGP Linear Regulator
Output Voltage
Output Voltage
Over Current Trip Level
Common Functions
Oscillator Frequency
PWRGD Threshold4 Switcher
PWRGD Delay Switcher
PWRGD Hysteresis Switcher
PWRGD Threshold4 Linear
Regulators
Conditions
ILOAD ≤ 2A
ILOAD ≤ 2A
ILOAD ≤ 2A, TYPEDET = 0V
ILOAD ≤ 2A, TYPEDET = OPEN
Logic HIGH [VVID + 85mV]
Logic LOW [VVID–155mV]
HIGH → LOW
All Outputs
Min. Typ. Max. Units
• 1.188 1.212 1.236 V
80
%VO
• 2.375 2.5 2.625 V
80
%VO
• 1.425 1.5 1.575 V
• 3.135 3.3 3.465 V
80
%VO
• 255 300 345 kHz
• 88
• 80
112 %
120
6
µsec
25
mV
•
80
%Vout
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
0.5mΩ 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.
4
REV. 1.0.4 1/29/02
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