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NCP3170ADR2G 数据手册 - ON Semiconductor（安森美）
制造商:
ON Semiconductor（安森美）
分类:
DC/DC转换器
封装:
SOIC-8
描述:
ON SEMICONDUCTOR NCP3170ADR2G 直流-直流开关降压(逐步递减)稳压器, 可调, 4.5V-18V输入, 1.25V-5V输出, 3A输出, SOIC-8
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NCP3170ADR2G数据手册
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of 28 Go
若手册格式错乱，请下载阅览PDF原文件
NCP3170
www.onsemi.com
4
Table 4. ELECTRICAL CHARACTERISTICS
(T
A
= 25°C, V
IN
= V
EN
= 12 V, V
OUT
= 3.3 V for min/max values unless otherwise noted (Note 7))
Characteristic
Conditions Min Typ Max Unit
Input Voltage Range (Note 5) 4.5 − 18 V
SUPPLY CURRENT
Quiescent Supply Current NCP3170A
NCP3170B
V
IN
= EN = 12 V V
FB
= 0.8 V
(Note 5)
−
−
1.7
1.7
2.0
2.0
mA
Shutdown Supply Current EN = 0 V (Note 5) − 13 17
mA
UNDER VOLTAGE LOCKOUT
VIN UVLO Threshold
V
IN
Rising Edge (Note 5) − 4.41 − V
VIN UVLO Threshold V
IN
Falling Edge (Note 5) − 4.13 − V
MODULATOR
Oscillator Frequency NCP3170A
NCP3170B
Enable = V
IN
450
900
500
1000
550
1100
kHz
Maximum Duty Ratio NCP3170A
NCP3170B
91
90
−
−
96
96
%
Minimum Duty Ratio NCP3170A
NCP3170B
V
IN
= 12 V 6.0
4.0
−
−
11
11.5
%
VIN Soft Start Ramp Time V
FB
= VCOMP 3.5 4.6 6.0 ms
OVER CURRENT
Current Limit (Note 4) 4.0 − 6.0 A
PWM COMPENSATION
VFB Feedback Voltage T
A
= 25°C 0.792 0.8 0.808 V
Line Regulation (Note 4) − 1 − %
GM − 201 −
mS
AOL DC gain (Note 4) 40 55 − dB
Unity Gain BW (C
OUT
= 10 pF) (Note 4) 2.0 − − MHz
Input Bias Current (Current Out of FB IB Pin) (Note 4) − − 286 nA
IEAOP Output Source Current V
FB
= 0 V − 20.1 −
mA
IEAOM Output Sink Current V
FB
= 2 V − 21.3 −
mA
ENABLE
Enable Threshold (Note 5) − 1.41 − V
POWER GOOD
Power Good High On Threshold − 875 − mV
Power Good High Off Threshold − 859 − mV
Power Good Low On Threshold − 712 − mV
Power Good Low Off Threshold − 728 − mV
Over Voltage Protection Threshold − 998 − mV
Power Good Low Voltage
V
IN
= 12 V, IPG = 500 mA
− 0.195 − V
PWM OUTPUT STAGE
High-Side Switch On-Resistance
V
IN
= 12 V
V
IN
= 4.5 V
−
−
90
100
130
150
mW
Low-Side Switch On-Resistance V
IN
= 12 V
V
IN
= 4.5 V
−
−
25
29
35
39
mW
THERMAL SHUTDOWN
Thermal Shutdown (Notes 4 and 6) − 164 − °C
Hysteresis − 43 − °C
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
4. Guaranteed by design
5. Ambient temperature range of −40°C to +85°C.
6. This is not a protection feature.
7. The device is not guaranteed to operate beyond the maximum operating ratings.
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