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CS5173GD8

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21
© Semiconductor Components Industries, LLC, 2010
January, 2010 − Rev. 23
1 Publication Order Number:
CS5171/D
CS5171, CS5172, CS5173,
CS5174
1.5 A 280 kHz/560 kHz
Boost Regulators
The CS5171/2/3/4 products are 280 kHz/560 kHz switching
regulators with a high efficiency, 1.5 A integrated switch. These parts
operate over a wide input voltage range, from 2.7 V to 30 V. The
flexibility of the design allows the chips to operate in most power
supply configurations, including boost, flyback, forward, inverting,
and SEPIC. The ICs utilize current mode architecture, which allows
excellent load and line regulation, as well as a practical means for
limiting current. Combining high frequency operation with a highly
integrated regulator circuit results in an extremely compact power
supply solution. The circuit design includes provisions for features
such as frequency synchronization, shutdown, and feedback controls
for either positive or negative voltage regulation. These parts are
pin−to−pin compatible with LT1372/1373.
Part Number Frequency Feedback Voltage Polarity
CS5171 280 kHz positive
CS5172 280 kHz negative
CS5173 560 kHz positive
CS5174 560 kHz negative
Features
• Integrated Power Switch: 1.5 A Guaranteed
• Wide Input Range: 2.7 V to 30 V
• High Frequency Allows for Small Components
• Minimum External Components
• Easy External Synchronization
• Built in Overcurrent Protection
• Frequency Foldback Reduces Component Stress During an
Overcurrent Condition
• Thermal Shutdown with Hysteresis
• Regulates Either Positive or Negative Output Voltages
• Shut Down Current: 50 mA Maximum
• Pin−to−Pin Compatible with LT1372/1373
• Wide Temperature Range
♦ Industrial Grade: −40°C to 125°C
♦ Commercial Grade: 0°C to 125°C
• Pb−Free Packages are Available
517xy = Device Code
x= 1, 2, 3, or 4
y= E, G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
ORDERING INFORMATION
CS5171/3
CS5172/4
SOIC−8
D SUFFIX
CASE 751
V
CC
SS
1
517xy
ALYW
G
8
AGNDTest
PGNDFB
V
SW
V
C
MARKING DIAGRAM AND
PIN CONNECTIONS
V
CC
SS
1
517xy
ALYW
G
8
AGNDNFB
PGND
Test
V
SW
V
C
http://onsemi.com
See detailed ordering and shipping information in the
package dimensions section on page 20 of this data sheet.
1
8
CS5171, CS5172, CS5173, CS5174
http://onsemi.com
2
+
CS5171/3
1
2
3
45
6
7
8
V
OUT
L1
5 V
C3
22 mF
V
C
FB
Test
SS
V
CC
AGND
PGND
V
SW
+
MBRS120T3
D1
22 mH
C2
22 mF
R3
1.28 k
3.72 k
R2
C1
SS
3.3 V
R1
5 k
0.01 mF
Figure 1. Applications Diagram
MAXIMUM RATINGS
Rating Value Unit
Junction Temperature Range, T
J
−40 to +150 °C
Storage Temperature Range, T
STORAGE
−65 to +150 °C
Package Thermal Resistance, Junction−to−Case, R
q
JC
Junction−to−Ambient, R
q
JA
45
165
°C/W
°C/W
Lead Temperature Soldering: Reflow (Note 1) 230 Peak °C
ESD, Human Body Model 1.2 kV
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. 60 second maximum above 183°C.
MAXIMUM RATINGS
Pin Name Pin Symbol V
MAX
V
MIN
I
SOURCE
I
SINK
IC Power Input V
CC
35 V −0.3 V N/A 200 mA
Shutdown/Sync SS 30 V −0.3 V 1.0 mA 1.0 mA
Loop Compensation V
C
6.0 V −0.3 V 10 mA 10 mA
Voltage Feedback Input FB
(CS5171/3 only)
10 V −0.3 V 1.0 mA 1.0 mA
Negative Feedback Input
(transient, 10 ms)
NFB
(CS5172/4 only)
−10 V 10 V 1.0 mA 1.0 mA
Test Pin Test 6.0 V −0.3 V 1.0 mA 1.0 mA
Power Ground PGND 0.3 V −0.3 V 4 A 10 mA
Analog Ground AGND 0 V 0 V N/A 10 mA
Switch Input V
SW
40 V −0.3 V 10 mA 3.0 A
CS5171, CS5172, CS5173, CS5174
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (2.7 V< V
CC
< 30 V; Industrial Grade: −40°C < T
J
< 125°C;
Commercial Grade: 0°C < T
J
< 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)
V
C
tied to FB; measure at FB 1.246 1.276 1.300 V
NFB Reference Voltage (CS5172/4 only) V
C
= 1.25 V −2.55 −2.45 −2.35 V
FB Input Current (CS5171/3 only) FB = V
REF
−1.0 0.1 1.0
mA
NFB Input Current (CS5172/4 only) NFB = NV
REF
−16 −10 −5.0
mA
FB Reference Voltage Line Regulation
(CS5171/3 only)
V
C
= FB − 0.01 0.03 %/V
NFB Reference Voltage Line Regulation
(CS5172/4 only)
V
C
= 1.25 V − 0.01 0.05 %/V
Positive Error Amp Transconductance
I
VC
= ± 25 mA
300 550 800
mMho
Negative Error Amp Transconductance
I
VC
= ± 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
V
C
Source Current FB = 1.0 V or NFB = −1.9 V, V
C
= 1.25 V 25 50 90
mA
V
C
Sink Current FB = 1.5 V or NFB = −3.1 V, V
C
= 1.25 V 200 625 1500
mA
V
C
High Clamp Voltage FB = 1.0 V or NFB = −1.9 V;
V
C
sources 25 mA
1.5 1.7 1.9 V
V
C
Low Clamp Voltage
FB = 1.5 V or NFB = −3.1 V, V
C
sinks 25 mA
0.25 0.50 0.65 V
V
C
Threshold Reduce V
C
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 ≤ V
CC
≤ 12 V
12 V < V
CC
≤ 30 V
12
12
80
36
350
200
ms
ms
2. Guaranteed by design, not 100% tested in production.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21

CS5173GD8

Mfr. #:
Buy CS5173GD8
Manufacturer:
ON Semiconductor
Description:
Switching Voltage Regulators 1.5A High Efficiency
Lifecycle:
New from this manufacturer.
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