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| FAN2315MPX Datasheet, PDF (5/19 Pages) Fairchild Semiconductor – FAN2315 TinyBuck 15 A Integrated Synchronous Buck Regulator | |||
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Electrical Characteristics
Unless otherwise noted; VIN=12 V, VOUT=1.2 V, and TA=TJ=-40 to 125°C.
Symbol
Parameter
Condition
Supply Current
IVIN,SD
Shutdown Current
IVIN,Q
Quiescent Current
IVIN,GateCharge Gate Charge Current
Reference, Feedback Comparator
VFB
FB Voltage Trip Point
IFB
FB Pin Bias Current
Modulator
tON
On-Time Accuracy
tOFF,MIN
DMIN
Minimum SW Off-Time
Minimum Duty Cycle
fMINF
Minimum Frequency Clamp
Soft-Start
ISS
tON,SSMOD
Soft-Start Current
SS On-Time Modulation
VSSCLAMP,NOM Nominal Soft-Start Voltage Clamp
VSSCLAMP,OVL
Soft-Start Voltage Clamp in Overload
Condition
EN=0 V
EN=5 V, Not Switching
EN=5 V, fSW=500 kHz
RFREQ=56.2 k, VIN=10 V,
tON=250 ns, No Load
FB=1 V
SS=0.5 V
SS<0.6 V
VFB=0.6 V
VFB=0.3 V, OC Condition
PFM Zero-Crossing Detection Comparator
VOFF
ZCD Offset Voltage
Current Limit
ILIM
Valley Current Limit Accuracy
VILIM,OFFSET Comparator Offset
TA=TJ=25°C
TA=TJ=25°C, IVALLEY=18 A
Min.
590
-100
-20
18.2
7
25
-6
-10
-1
Typ.
22
596
0
320
0
25.4
10
400
40
Max.
10
1.8
602
100
20
374
32.7
13
100
0
10
1
Unit
µA
mA
mA
mV
nA
%
ns
%
kHz
µA
%
mV
mV
mV
%
mV
KILIM
ILIM Set-Point Scale Factor
80
ILIMTC
Enable
VTH+
VTH-
IENLK
IENLK
UVLO
VON
VHYS
Temperature Coefficient
Rising Threshold
Falling Threshold
Enable Pin Leakage
Enable Pin Leakage
VCC Good Threshold Rising
Hysteresis Voltage
EN=1.2 V
EN=5 V
4000
ppm/°C
2.0
V
0.8
V
100
nA
76
µA
4.4
V
160
mV
Continued on the following pageâ¦
© 2011 Fairchild Semiconductor Corporation
FAN2315 ⢠Rev. 1.0.4
5
www.fairchildsemi.com
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