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CS5157HGD16

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
© Semiconductor Components Industries, LLC, 2005
October, 2005 − Rev. 7
1 Publication Order Number:
CS5157H/D
CS5157H
CPU 5−Bit Synchronous
Buck Controller
The CS5157H is a 5−bit synchronous dual N−Channel buck
controller. It is designed to provide unprecedented transient response
for today’s demanding high−density, high−speed logic. The regulator
operates using a proprietary control method, which allows a 100 ns
response time to load transients. The CS5157H is designed to operate
over a 4.25−20 V range (V
CC
) using 12 V to power the IC and 5.0 V or
12 V as the main supply for conversion.
The CS5157H is specifically designed to power Pentium
®
II
processors and other high performance core logic. It includes the
following features: on board, 5−bit DAC, short circuit protection,
1.0% output tolerance, V
CC
monitor, and programmable Soft−Start
capability. The CS5157H is available in 16 pin surface mount.
Features
• Dual N−Channel Design
• Excess of 1.0 MHz Operation
• 100 ns Transient Response
• 5−Bit DAC
• 30 ns Gate Rise/Fall Times
• 1.0% DAC Accuracy
• 5.0 V and 12 V Operation
• Remote Sense
• Programmable Soft−Start
• Lossless Short Circuit Protection
• V
CC
Monitor
• 25 ns FET Nonoverlap Time
• V
2
t Control Topology
• Current Sharing
• Overvoltage Protection
• Pb−Free Packages are Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
CS5157HGDR16
CS5157H = Device Code
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
Device Package Shipping
†
ORDERING INFORMATION
CS5157HGD16 SO−16 48 Units/Rail
SO−16 2500/Tape & Ree
l
SOIC−16
D SUFFIX
CASE 751B
PIN CONNECTIONS
1
CS5157HG
AWLYWW
16
MARKING DIAGRAM
1
16
V
CC2
V
FFB
1
16
V
GATE(H)
C
OFF
PGNDV
ID4
V
GATE(L)
SS
V
CC1
V
ID3
LGNDV
ID2
COMPV
ID1
V
FB
V
ID0
http://onsemi.com
†
For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
s
Brochure, BRD8011/D.
CS5157HGDR16G SO−16
(Pb−Free)
2500/Tape & Ree
l
CS5157HGD16G SO−16
(Pb−Free)
48 Units/Rail
CS5157H
http://onsemi.com
2
Figure 1. Application Diagram, Switching Power Supply for Core Logic − Pentium
)
II Processor
COMP
V
FFB
V
FB
V
GATE(H)
V
CC2
V
CC1
V
ID0
V
ID1
V
ID2
V
ID3
PGND
SS
C
OFF
CS5157H
AIEI
12 V
330 pF
0.1 mF
LGND
1200 mF/10 V × 3
0.1 mF
1.3 V to 3.5 V @ 13 A
V
ID0
V
ID1
V
ID2
V
ID3
AIEI
1200 mF/10 V × 5
2.0 mH
IRL3103
0.33 mF
5.0 V
3.3 k
100 pF
V
ID4
V
ID4
IRL3103
V
GATE(L)
MAXIMUM RATINGS
Rating Value Unit
Operating Junction Temperature, T
J
0 to 150 °C
Lead Temperature Soldering: Reflow: (SMD styles only) (Note 1) 230 peak °C
Storage Temperature Range, T
S
−65 to +150 °C
ESD Susceptibility (Human Body Model) 2.0 kV
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. 60 second maximum above 183°C.
MAXIMUM RATINGS
Pin Name Max Operating Voltage Max Current
V
CC1
16 V/−0.3 V 25 mA DC/1.5 A peak
V
CC2
20 V/−0.3 V 20 mA DC/1.5 A peak
SS 6.0 V/−0.3 V
−100 mA
COMP 6.0 V/−0.3 V
200 mA
V
FB
6.0 V/−0.3 V
−0.2 mA
C
OFF
6.0 V/−0.3 V
−0.2 mA
V
FFB
6.0 V/−0.3 V
−0.2 mA
V
ID0
− V
ID4
6.0 V/−0.3 V
−50 mA
V
GATE(H)
20 V/−0.3 V 100 mA DC/1.5 A peak
V
GATE(L)
16 V/−0.3 V 100 mA DC/1.5 A peak
LGND 0 V 25 mA
PGND 0 V 100 mA DC/1.5 A peak
CS5157H
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (0°C < T
A
< +70°C; 0°C < T
J
< +125°C; 8.0 V < V
CC1
< 14 V; 5.0 V < V
CC2
< 20 V;DAC Code:
V
ID4
= V
ID2
= V
ID1
= V
ID0
= 1; V
ID3
= 0
;
CV
GATE(L)
and CV
GATE(H)
= 1.0 nF; C
OFF
= 330 pF; C
SS
= 0.1 mF, unless otherwise specified.)
Characteristic Test Conditions Min Typ Max Unit
Error Amplifier
V
FB
Bias Current V
FB
= 0 V − 0.3 1.0
mA
Open Loop Gain 1.25 V < V
COMP
< 4.0 V; (Note 2) 50 60 − dB
Unity Gain Bandwidth (Note 2) 500 3000 − kHz
COMP SINK Current V
COMP
= 1.5 V; V
FB
= 3.0 V; V
SS
> 2.0 V 0.4 2.5 8.0 mA
COMP SOURCE Current V
COMP
= 1.2 V; V
FB
= 2.7 V; V
SS
= 5.0 V 30 50 80
mA
COMP CLAMP Current V
COMP
= 0 V; V
FB
= 2.7 V 0.4 1.0 1.6 mA
COMP High Voltage V
FB
= 2.7 V; V
SS
= 5.0 V 4.0 4.3 5.0 V
COMP Low Voltage V
FB
= 3.0 V − 160 600 mV
PSRR 8.0 V < V
CC1
< 14 V @ 1.0 kHz; (Note 2) 60 85 − dB
V
CC1
Monitor
Start Threshold Output switching 3.75 3.90 4.05 V
Stop Threshold Output not switching 3.70 3.85 4.00 V
Hysteresis Start−Stop − 50 − mV
V
GATE(H)
and V
GATE(L)
Out SOURCE Sat at 100 mA Measure V
CC1
− V
GATE(L)
; V
CC2
− V
GATE(H)
− 1.2 2.0 V
Out SINK Sat at 100 mA Measure V
GATE(H)
− V
PGND
; V
GATE(L)
− V
PGND
− 1.0 1.5 V
Out Rise Time 1.0 V < V
GATE(H)
< 9.0 V; 1.0 V < V
GATE(L)
< 9.0 V;
V
CC1
= V
CC2
= 12 V
− 30 50 ns
Out Fall Time 9.0 V > V
GATE(H)
> 1.0 V; 9.0 V > V
GATE(L)
> 1.0 V;
V
CC1
= V
CC2
= 12 V
− 30 50 ns
Delay V
GATE(H)
to V
GATE(L)
V
GATE(H)
falling to 2.0 V; V
CC1
= V
CC2
= 8.0 V;
V
GATE(L)
rising to 2.0 V
− 25 50 ns
Delay V
GATE(L)
to V
GATE(H)
V
GATE(L)
falling to 2.0 V; V
CC1
= V
CC2
= 8.0 V;
V
GATE(H)
rising to 2.0 V
− 25 50 ns
V
GATE(H)
, V
GATE(L)
Resistance Resistor to LGND (Note 2) 20 50 100
kW
V
GATE(H)
, V
GATE(L)
Schottky LGND to V
GATE(H)
@ 10 mA
LGND to V
GATE(L)
@ 10 mA
− 600 800 mV
Soft−Start (SS)
Charge Time − 1.6 3.3 5.0 ms
Pulse Period − 25 100 200 ms
Duty Cycle (Charge Time /Pulse Period) × 100 1.0 3.3 6.0 %
COMP Clamp Voltage V
FB
= 0 V; V
SS
= 0 0.50 0.95 1.10 V
V
FFB
SS Fault Disable V
GATE(H)
= Low; V
GATE(L)
= Low 0.9 1.0 1.1 V
High Threshold − − 2.5 3.0 V
PWM Comparator
Transient Response V
FFB
= 0 to 5.0 V to V
GATE(H)
= 9.0 V to 1.0 V;
V
CC1
= V
CC2
= 12 V
− 100 125 ns
V
FFB
Bias Current V
FFB
= 0 V − 0.3 −
mA
2. Guaranteed by design, not 100% tested in production.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

CS5157HGD16

Mfr. #:
Buy CS5157HGD16
Manufacturer:
ON Semiconductor
Description:
Switching Controllers 5-Bit Synchronous
Lifecycle:
New from this manufacturer.
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