CS5158GDR16 Cherry Semiconductor Corporation, CS5158GDR16 Datasheet

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CS5158GDR16

Manufacturer Part Number
CS5158GDR16
Description
SPU 5-bit synchronous buck controller
Manufacturer
Cherry Semiconductor Corporation
Datasheet

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Switching Power Supply for core logic - Pentium
Rev. 2/16/99
V
Pentium is a registered trademark of Intel Corporation.
330pF
CPU 5-Bit Synchronous Buck Controller
The CS5158 is a 5-Bit synchronous
dual N-Channel buck controller. It
is designed to provide unprece-
dented transient response for
today’s demanding high-density,
high-speed logic. The regulator
operates using a proprietary control
method, which allows a 100ns
response time to load transients.
The CS5158 is designed to operate
over a 4.25-16V range (V
12V to power the IC and 5V as the
main supply for conversion.
2
is a trademark of Switch Power, Inc.
0.1µF
V
V
V
V
V
ID0
ID1
ID2
ID3
ID4
0.33µF
V
V
V
V
V
V
C
SS
COMP
12V
CC1
ID0
ID1
ID2
ID3
ID4
OFF
CS5158
V
LGnd
CC2
CC
Description
Application Diagram
V
) using
V
GATE(H)
GATE(L)
PGnd
V
V
FFB
FB
0.1µF
100pF
The CS5158 is specifically designed
to power Pentium
and other high performance core
logic. It includes the following fea-
tures: on board, 5-Bit DAC, short
circuit protection, 0.8% output tol-
erance for the 01111 DAC code
(1.3V) and 1% for the remaining
DAC codes, V
grammable soft start capability. The
CS5158 is available in 16 pin surface
mount.
3.3k
CS5158
5V
®
IRL3103
IRL3103
II processor
CC
1200µF/10V x 3
AlEl
2µH
monitor, and pro-
®
1
II processors
1.3V to 3.5V @ 13A
1200µF/10V x 5
AlEl
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Cherry Semiconductor Corporation
Web Site: www.cherry-semi.com
C
V
Dual N-Channel Design
Excess of 1MHz Operation
100ns Transient Response
5-Bit DAC
Backward Compatible with
Adjustable CS5157
30ns Gate Rise/Fall Times
0.8% Accuracy for the
01111 DAC Code and 1%
for the Remaining DAC
Codes
5V & 12V Operation
Remote Sense
Programmable Soft Start
Lossless Short Circuit
Protection
V
25ns FET Nonoverlap Time
V
Current Sharing
Overvoltage Protection
V
V
V
V
V
Email: info@cherry-semi.com
OFF
FFB
Package Options
SS
ID0
ID1
ID2
ID3
ID4
CC
2
TM
16 Lead SO Narrow
1
Monitor
Features
Control Topology
A
V
COMP
LGnd
V
V
PGnd
V
V
®
FB
CC1
GATE(L)
GATE(H)
CC2
Company

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CS5158GDR16 Summary of contents

Page 1

... V 1 ID0 FB V COMP ID1 V LGnd ID2 V V ID3 CC1 V SS GATE(L) V PGnd ID4 C V OFF GATE( FFB CC2 Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com A Company ® ...

Page 2

Pin Name .16V/-0.3V . ...

Page 3

Electrical Characteristics: 0°C < ID1 ID0 ID3 GATE(L) PARAMETER DAC: continued ID4 ID3 ID2 ID1 ID0 ...

Page 4

Electrical Characteristics: 0°C < ID0 ID3 GATE(L) PARAMETER PWM Comparator Transient Response V Bias Current FFB Supply Current I No Switching CC1 I No Switching CC2 Operating I CC1 Operating ...

Page 5

PACKAGE PIN # PIN SYMBOL 16L SO Narrow 11 PGnd 12 V GATE( CC1 14 LGnd 15 COMP Monitor CC1 Comparator V - CC1 + 3.90V 3.85V SS V ID0 V ID1 Error 5 BIT ...

Page 6

Theory of Operation Control Method 2 The V TM method of control uses a ramp signal that is gen- erated by the ESR of the output capacitors. This ramp is proportional to the AC current through the ...

Page 7

capacitor. The V control loop will adjust switch duty cycle as required to ensure the regulator output voltage tracks the output of the error amplifier. The ...

Page 8

Trace1 - Regulator Output Voltage (10mV/div.) Trace 2 - Inductor Switching Node (5V/div.) Figure 6: Peak-to-peak ripple 2.8V, I OUT Transient Response 2 TM The CS5158 V control loop’s 100ns reaction time pro- vides unprecedented transient response ...

Page 9

Short Circuit Protection A lossless hiccup mode short circuit protection feature is provided, requiring only the soft start capacitor to imple- ment short circuit condition occurs (V low comparator sets the FAULT latch. This causes the top MOSFET ...

Page 10

Trace from PC Power Supply (2V/div.) Trace 1 = Regulator Output Voltage (1V/div.) Figure 13: OVP response to an input-to-output short circuit by pulling the input voltage to ground. External Output Enable Circuit On/off control of the ...

Page 11

V = 12V - 5V = 7V, V GATE(H) GATE(L) Trace (10V/div.) GATE(H) Math GATE(H) IN Trace ...

Page 12

A heatsink may be added to TO-220 components to reduce their thermal impedance. A number of PC board layout techniques such as thermal vias and additional copper foil area can be used to improve the power handling capability of surface ...

Page 13

MBRS120 MBRS 120 1µF MBRS120 1µF Si4410DY CC2 CC1 GATE(H) V ID0 V ID1 V ID2 CS5158 V ID3 V GATE(L) V ID4 C PGnd OFF 330pF 0.1µF 3.3k COMP V FFB ...

Page 14

... PACKAGE DIMENSIONS IN mm (INCHES) Lead Count Metric Max 16L SO Narrow 10.00 1.27 (.050) 0.40 (.016) REF: JEDEC MS-012 Ordering Information Part Number Description CS5158GD16 16L SO Narrow CS5158GDR16 16L SO Narrow (tape & reel) Rev. 2/16/99 Package Specification D Thermal Data English R Min Max Min ΘJC R 9.80 .394 .386 Θ ...

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