L4976D(2000) 查看數據表（PDF） - STMicroelectronics
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L4976D Datasheet PDF : 11 Pages
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L4976
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Reference Section
Reference Voltage
Line Regulation
Load Regulation
Short Circuit Current
Test Condition
Iref = 0 to 10mA;
VCC = 8 to 55V
Iref = 0mA;
VCC = 8 to 55V
Vref = 0 to 5mA;
VCC = 0 to 20mA
DC Characteristics
Iqop
Total operating quiescent
current
Iq
Quiescent current
Error Amplifier
VFB
Voltage Feedback Input
RL
Line regulation
Ref. voltage stability vs
temperature
VoH
High level output voltage
VoL
Low level output voltage
Io source Source output current
Io sink
Sink output current
Ib
Source bias current
SVRR E/A Supply voltage ripple rejection
DC open loop gain
gm
Transconductance
Oscillator Section
Ramp Valley
Ramp peak
Maximum duty cycle
Maximum Frequency
Duty Cycle = 0; VFB = 3.8V
Vcc = 8 to 55V
VFB = 2.5V
VFB = 3.8V
Vcomp = 6V; VFB = 2.5V
Vcomp = 6V; VFB = 3.8V
Vcomp = Vfb; Vcc = 8 to 55V
RL = ∞
Icomp = -0.1 to 0.1mA
Vcomp = 6V
Vcc = 8V
Vcc = 55V
Duty Cycle = 0%
Rosc = 13kΩ, Cosc = 820pF
Min. Typ. Max. Unit
5.0
5.1
5.2
V
* 4.950 5.1 5.250 V
5
10 mV
2
10 mV
6
25 mV
30
65
100 mA
4
6
mA
2.5
3.5 mA
3.33 3.36 3.39
V
5
10
mV
*
0.4
mV/°C
10.3
V
0.65
V
180 220
µA
200 300
µA
2
3
µA
60
80
dB
50
57
dB
2.5
ms
0.78 0.85 0.92
V
2
2.15 2.3
V
9
9.6 10.2
V
95
97
%
500 kHz
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