FAN2103 Datasheet, PDF (5/14 Pages) Fairchild Semiconductor – 3A, 24V Input Integrated Synchronous Buck Regulator

Electrical Specifications
Recommended operating conditions are the result of using the circuit shown in Figure 1 unless otherwise noted.
Parameter
Conditions
Min.
Power Supplies
VCC Current
VCC UVLO Threshold
SW = Open, FB = 0.7V, VCC = 5V,
FSW = 600KHz
Shutdown: EN = 0, VCC = 5V
Power Saving Mode, VCC = 5V, FMIN
Rising VCC
4.1
Hysteresis
Power Output Section
N-Channel (Q1) RDS(ON)
N-Channel (Q2) RDS(ON)
VCC = 5V, 25°C
Oscillator
RT = 50KΩ
255
Frequency
RT = 24KΩ
540
Minimum On-Time⁽²⁾
Ramp Amplitude, pk–pk
Minimum Off-Time⁽²⁾
16VIN, 1.8VOUT, RT = 30KΩ,
RRAMP = 200KΩ
Reference
FAN2103M, 25°C
794
Reference Voltage (VFB)
FAN2103EM, 25°C
795
FAN2103M,
Temp. Coefficient (-10 to +85°C)
FAN2103EM
Temp. Coefficient (-40 to +85°C)
Error Amplifier
DC Gain⁽²⁾
80
Gain Bandwidth Product⁽²⁾
VCC = 5V
12
Output Voltage (VCOMP)
0.4
Output Current, Sourcing
VCC = 5V, VCOMP = 2.2V
1.5
Output Current, Sinking
VCC = 5V, VCOMP = 1.2V
0.8
FB Bias Current
VFB = 0.8V, 25°C
-850
Protection and Shutdown
Current Limit
RILIM open
3.8
ILIM Current
25°C, VCC = 5V
9
Over-Temperature Shutdown
Over-Temperature Hysteresis
Internal Temperature
Over-Voltage Threshold
2 Consecutive Clock Cycles
110
Under-Voltage Shutdown
16 Consecutive Clock Cycles
68
Fault Discharge Threshold
Measured at FB Pin
Fault Discharge Hysteresis
Measured at FB Pin (VFB ~500mV)
Note:
2. Specifications guaranteed by design and characterization; not production tested.
Typ. Max. Unit
8
12
mA
7
10
µA
2.2
4.5
mA
4.3
4.5
V
300
mV
31
35
mΩ
23
25
mΩ
300
600
50
0.53
100
345 KHz
660 KHz
65
ns
V
150
ns
800
806
mV
800
805
mV
50
PPM
70
PPM
85
15
2.2
1.2
-650
3.2
-450
dB
MHz
V
mA
mA
nA
5.0
7.0
A
10
11
µA
160
°C
30
°C
115
120 %VOUT
73
78
%VOUT
250
mV
250
mV
© 2007 Fairchild Semiconductor Corporation
FAN2103 Rev. 1.0.3
5
www.fairchildsemi.com