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FAN5099 Datasheet(PDF) 6 Page - Fairchild Semiconductor

Part No. FAN5099
Description  Wide Frequency Synchronous Buck PWM AND LDO Controller
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5099 Datasheet(HTML) 6 Page - Fairchild Semiconductor

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© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5099 Rev. 1.1.3
6
Electrical Characteristics (Continued)
Notes:
4. All limits at operating temperature extremes are guaranteed by design, characterization, and statistical quality control.
5. AC specifications guaranteed by design/characterization (not production tested).
6. For a case when VCC is higher than the typical 5V VCC, voltage observed at VCC pin when the internal shunt regulator
is sinking current to keep voltage on VCC pin constant.
7. Test Conditions: VLDO_IN = 1.5V and VLDO_OUT = 1.2V.
Unless otherwise noted, VCC = 5V, TA = 25°C, using the circuit in Figure 1. The ‘’ denotes that the specifications apply
to the full ambient operating temperature range.(4, 5)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
Protection/Disable
ILIM
ILIMIT Source Current
9
10
11
μA
ISWPD
SW Pull-down Current
SW = 1V, EN = 0V
mA
VUV
Under-Voltage Threshold
As % of set point;
2
μS noise filter
65
75
80
%
VOV
Over-Voltage Threshold
As % of set point;
2
μS noise filter
110
115
120
%
Supply Current
TSD
Thermal Shutdown
160
°C
VEN
Enable Threshold Voltage
Enable Condition
2.0
V
Disable Condition
0.8
V
Enable Source Current
VCC = 5V
50
μA
Enable Sink Current
VCC = 5V and fault conditions
(overload, short-circuit,
over-voltage, under-voltage)
10
μA
Low Drop-Out (LDO)(7)
VLDOREF Reference Voltage
(measured at FBLDO pin)
TA = 0°C to 70°C
775
800
825
mV
TA = -40°C to 85°C
770
800
830
mV
Regulation
0A
≤ ILOAD ≤ 5A
1.17
1.20
1.23
V
VLDO_DO Drop-out Voltage
ILOAD ≤ 5A and RDS-ON < 50mΩ
0.3
V
External Gate Drive
VCC = 4.75V
4.5
V
VCC = 5.6V
5.3
V
Gate Drive Source Current
1.2
mA
Gate Drive Sink Current
400
μA


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