FAN5182 Datasheet, PDF (5/18 Pages) Fairchild Semiconductor – Adjustable Output 1, 2, or 3-Phase Synchronous Buck Controller

Parameter
Symbol
Conditions
Min. Typ. Max.
Current Limit Threshold
V_CL
Voltage
V_CSREF - V_CSCOMP, R_ILIMIT =
250k Ω
105
125
145
Current Limit Setting Ratio
DELAY Normal Mode Voltage
DELAY Overcurrent Threshold
Latch-Off Delay Time (Note 2)
SOFT-START
V _DELAY(NM)
V _DELAY(OC)
t _DELAY
V_CL/I_ILIMIT
R_DELAY = 250kΩ
R_DELAY = 250kΩ
R_DELAY = 250kΩ, C_DELAY = 12nF
10.4
2.9
3
3.1
1.7
1.8
1.9
1.5
Output Current, Soft-Start
I_DELAY(SS)
During startup, DELAY < 2.4V
●
15
20
25
Mode
Soft-Start Delay Time (Note 2) t_DELAY(SS)
R_DELAY = 250kΩ, C_DELAY = 12nF
500
ENABLE INPUT
Input Low Voltage
Input High Voltage
Input Hysteresis Voltage
V_IL(EN)
V_IH(EN)
●
0.8
● _2.0
100
Input Current
I_IN(EN)
POWER GOOD COMPARATOR
●
-1
+1
Undervoltage Threshold
Overvoltage Threshold
Ouput Low Voltage
Power Good Delay Time
V_PWRGD(UV)
V_PWRGD(OV)
V_OL(PWRGD)
Relative to FBRTN
Relative to FBRTN
I_PWRGD(SINK) = 4mA
● ₆₀₀
● ₈₈₀
●
660
720
940
1000
225
400
200
Crowbar Trip Point
Crowbar Reset Point
V_CROWBAR
Relative to FBRTN
Relative to FBRTN
● _0.970
1.05
1.105
● ₅₅₀
650
750
Crowbar Delay Point (Note 2) t_CROWBAR Overvoltage to PWM going low
400
PWM OUTPUTS
Output Low Voltage
Output High Voltage
SUPPLY
V_OL(PWM)
V_OH(PWM)
I_PWM(SINK) = 400µA
I_PWM(SOURCE) = -400µA
●
160
500
● _4.0
5
DC Supply Current
●
5
10
UVLO THreshold Voltage
UVLO Hysteresis
V_UVLO
V_CC rising
● _6.5
6.9
7.3
● _0.7
0.9
1.1
Notes:
1. All limits at operating temperature extremes are guaranteed by design, characterization and statistical quality control.
2. Guaranteed by design, not tested in production.
Units
mV
mV/µA
V
V
ms
µA
µs
V
V
mV
µA
mV
mV
mV
ns
V
mV
ns
mV
V
mA
V
V
5
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FAN5182 Rev. 1.0.1