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CS5171_06 Datasheet(PDF) 3 Page - ON Semiconductor

Part No. CS5171_06
Description  1.5 A 280 kHz/560 kHz Boost Regulators
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS5171, CS5172, CS5173, CS5174
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (2.7 V< VCC < 30 V; Industrial Grade: −40°C < TJ < 125°C;
Commercial Grade: 0
°C < TJ < 125°C; For all CS5171/2/3/4 specifications unless otherwise stated.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Positive and Negative Error Amplifiers
FB Reference Voltage (CS5171/3 only)
VC tied to FB; measure at FB
1.246
1.276
1.300
V
NFB Reference Voltage (CS5172/4 only)
VC = 1.25 V
−2.55
−2.45
−2.35
V
FB Input Current (CS5171/3 only)
FB = VREF
−1.0
0.1
1.0
mA
NFB Input Current (CS5172/4 only)
NFB = NVREF
−16
−10
−5.0
mA
FB Reference Voltage Line Regulation
(CS5171/3 only)
VC = FB
0.01
0.03
%/V
NFB Reference Voltage Line Regulation
(CS5172/4 only)
VC = 1.25 V
0.01
0.05
%/V
Positive Error Amp Transconductance
IVC = ± 25 mA
300
550
800
mMho
Negative Error Amp Transconductance
IVC = ± 5 mA
115
160
225
mMho
Positive Error Amp Gain
(Note 2)
200
500
V/V
Negative Error Amp Gain
(Note 2)
100
180
320
V/V
VC Source Current
FB = 1.0 V or NFB = −1.9 V, VC = 1.25 V
25
50
90
mA
VC Sink Current
FB = 1.5 V or NFB = −3.1 V, VC = 1.25 V
200
625
1500
mA
VC High Clamp Voltage
FB = 1.0 V or NFB = −1.9 V;
VC sources 25 mA
1.5
1.7
1.9
V
VC Low Clamp Voltage
FB = 1.5 V or NFB = −3.1 V, VC sinks 25 mA
0.25
0.50
0.65
V
VC Threshold
Reduce VC from 1.5 V until switching stops
0.75
1.05
1.30
V
Oscillator
Base Operating Frequency
CS5171/2, FB = 1 V or NFB = −1.9 V
230
280
310
kHz
Reduced Operating Frequency
CS5171/2, FB = 0 V or NFB = 0 V
30
52
120
kHz
Maximum Duty Cycle
CS5171/2
90
94
%
Base Operating Frequency
CS5173/4, FB = 1 V or NFB = −1.9 V
460
560
620
kHz
Reduced Operating Frequency
CS5173/4, FB = 0 V or NFB = 0 V
60
104
160
kHz
Maximum Duty Cycle
CS5173/4
82
90
%
NFB Frequency Shift Threshold
Frequency drops to reduced operating frequency
−0.80
−0.65
−0.50
V
FB Frequency Shift Threshold
Frequency drops to reduced operating frequency
0.36
0.40
0.44
V
Sync/ Shutdown
Sync Range
CS5171/2
320
500
kHz
Sync Range
CS5173/4
640
1000
kHz
Sync Pulse Transition Threshold
Rise time = 20 ns
2.5
V
SS Bias Current
SS = 0 V
SS = 3.0 V
−15
−3.0
3.0
8.0
mA
mA
Shutdown Threshold
0.50
0.85
1.20
V
Shutdown Delay
2.7 V
≤ VCC ≤ 12 V
12 V < VCC ≤ 30 V
12
12
80
36
350
200
ms
ms
2. Guaranteed by design, not 100% tested in production.




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