SC1155CSW Semtech Corporation, SC1155CSW Datasheet

no-image

SC1155CSW

Manufacturer Part Number
SC1155CSW
Description
PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE
Manufacturer
Semtech Corporation
Datasheet
1.SC1155CSW.pdf (19 pages)

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Bonase Electronics (HK) Co., Limited Bonase Electronics (HK) Co., Limited
Part Number:
SC1155CSW
Quantity:
5 510
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
SC1155CSW
Manufacturer:
SEMTECH/美国升特
Quantity:
20 000
Company:
H&T Electronics H&T Electronics
Part Number:
SC1155CSW
Quantity:
14
PRELIMINARY - August 7, 2000
DESCRIPTION
The SC1155 is a synchronous-buck switch-mode con-
troller designed for use in single ended power supply
applications where efficiency is the primary concern.
The controller is a hysteretic type, with a user se-
lectable hysteresis. The SC1155 is ideal for implement-
ing DC/DC converters needed to power advanced mi-
croprocessors such as Pentium
single and multiple processor configurations. Inhibit,
under-voltage lockout and soft-start functions are in-
cluded for controlled power-up.
SC1155 features include an integrated 5 bit D/A con-
verter, temperature compensated voltage reference,
current limit comparator, over-current protection, and
an adaptive deadtime circuit to prevent shoot-through
of the power MOSFET during switching transitions.
Power good signaling, logic compatible shutdown, and
over-voltage protection are also provided. The inte-
grated D/A converter provides programmability of out-
put voltage from 1.1V to 1.85V in 25mV increments.
The SC1155 high side driver can be configured as
either a grounded reference or as a floating bootstrap
driver. The high and low side MOSFET drivers have a
peak current rating of 2 amps.
TYPICAL APPLICATION CIRCUIT
© 2000 SEMTECH CORP.
C2
0.01
R1
2k
R2
1k
R3
2.7k
R4
1k
C4
0.01
C7
0.1
C3
0.01
R6
20k
R8
10k
C8
0.01
0.001
C5
R5
100
+5V
C6
0.1
R7
150
10
11
12
13
14
1
2
3
4
5
6
7
8
9
C8
2.2uF
IOUT
DROOP
OCP
VHYST
VREFB
VSENSE
AGND
SOFTST
N/C
LODRV
LOHIB
DRVGND
LOWDR
DRV
®
llI and Athlon
U1
SC1155CSW
LOSENSE
HISENSE
BOOTLO
HIGHDR
PWRGD
IOUTLO
INHIBIT
VIN12V
BOOT
VID0
VID1
VID2
VID3
VID4
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+12V
PROGRAMMABLE SYNCHRONOUS
DC/DC HYSTERETIC CONTROLLER
WITH VRM 9.0 VID RANGE
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
®
C9
2.2uF
, in both
C12
0.33
R11
2.2
R12
3.9
C13
0.33
IRL3103S
IRL2203S
R10
10k
R9
10k
Q1
Q2
+5V
FEATURES
APPLICATIONS
ORDERING INFORMATION
SC1155CSW.TR
SC1155EVB
Note:
(1) Only available in tape and reel packaging. A reel
contains 1000 devices.
C16
0.1
PWRGD
=
=
=
=
=
=
=
=
=
=
=
INHIB
1.5uH
L2
DEVICE
Programmable hysteresis
5 bit DAC programmable output (1.1V-1.85V)
On-chip power good and OVP functions
Designed to meet latest Intel specifications
Up to 95% efficiency
+ 1% voltage tolerance over temperature
Server Systems and Workstations
Intel Pentium
AMD Athlon
Multiple Microprocessor Supplies
Voltage Regulator Modules
C17-C19
150uF/16V
L1
1uH
C21-C26
150uF/4V
(1)
C20
0.1
C27
0.1
®
Athlon is a registered trademark of AMD Corporation
Pentium is a registered trademark of Intel Corporation
®
Vin +5 to +12V
Vout = 1.1 to 1.85V
Core Supplies
Vin
GND
III Core Supplies
Evaluation Board
Vout
GND
PACKAGE
SO-28
TEMP. RANGE (T
0 - 125°C
SC1155
1
J
)

Related parts for SC1155CSW

Image
Part Number
Description
Manufacturer
Datasheet
Request R
SC1155
Part Number:
SC1155
Description:
PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE
Manufacturer:
Semtech Corporation
Datasheet:
SC1155.pdf (19 pages)
6666
Part Number:
6666
Description:
HIGH VOLTAGE CAPACITORS MONOLITHIC CERAMIC TYPE
Manufacturer:
Semtech Corporation
Datasheet:
6666.pdf (2 pages)
EZ1084CM
Part Number:
EZ1084CM
Description:
EZ1084CM5.0 AMP POSITIVE VOLTAGE REGULATOR
Manufacturer:
Semtech Corporation
Datasheet:
EZ1084CM.pdf (4 pages)
EZ1587CM
Part Number:
EZ1587CM
Description:
3.0 AMP LOW DROPOUT POSITIVE VOLTAGE REGULATORS
Manufacturer:
Semtech Corporation
Datasheet:
EZ1587CM.pdf (5 pages)
ACS8515
Part Number:
ACS8515
Description:
Manufacturer:
Semtech Corporation
Datasheet:
ACS8515.pdf (50 pages)
SR3.3
Part Number:
SR3.3
Description:
RailClamp Low Capacitance TVS Diode Array
Manufacturer:
Semtech Corporation
Datasheet:
SR3.3.pdf (7 pages)
SMF05C
Part Number:
SMF05C
Description:
Manufacturer:
Semtech Corporation
Datasheet:
SMF05C.pdf (7 pages)
SC1151CS
Part Number:
SC1151CS
Description:
Manufacturer:
Semtech Corporation
Datasheet:
SC1151CS.pdf (6 pages)
SC1182CSW
Part Number:
SC1182CSW
Description:
Manufacturer:
Semtech Corporation
Datasheet:
SC1182CSW.pdf (12 pages)
SC1185CSW
Part Number:
SC1185CSW
Description:
Manufacturer:
Semtech Corporation
Datasheet:
SC1185CSW.pdf (12 pages)
SC1205
Part Number:
SC1205
Description:
Manufacturer:
Semtech Corporation
Datasheet:
SC1205.pdf (12 pages)
SC1150CS
Part Number:
SC1150CS
Description:
Manufacturer:
Semtech Corporation
Datasheet:
SC1150CS.pdf (6 pages)
SC1152CS
Part Number:
SC1152CS
Description:
Manufacturer:
Semtech Corporation
Datasheet:
SC1152CS.pdf (7 pages)
MMBT9012
Part Number:
MMBT9012
Description:
Manufacturer:
Semtech Corporation
Datasheet:
MMBT9012.pdf (3 pages)
MMBT9013
Part Number:
MMBT9013
Description:
Manufacturer:
Semtech Corporation
Datasheet:
MMBT9013.pdf (3 pages)

SC1155CSW Summary of contents

Page 1

... APPLICATIONS = Server Systems and Workstations = Intel Pentium = AMD Athlon = Multiple Microprocessor Supplies = Voltage Regulator Modules ORDERING INFORMATION (1) DEVICE SC1155CSW.TR SC1155EVB Note: (1) Only available in tape and reel packaging. A reel contains 1000 devices. 28 PWRGD PWRGD R9 27 10k VID0 +5V 26 VID1 R10 ...

Page 2

PRELIMINARY - August 7, 2000 ABSOLUTE MAXIMUM RATINGS Parameter VIN12V BOOT to DRVGND BOOT to BOOTLO Digital Inputs AGND to DRVGND LOHIB to AGND LOSENSE to AGND IOUTLO to AGND HISENSE to AGND VSENSE to AGND Continuous Power Dissipation, T ...

Page 3

PRELIMINARY - August 7, 2000 PIN DESCRIPTION Pin Pin Name Pin Function 1 IOUT Current Out. The output voltage on this pin is proportional to the load current as measured across the high side MOSFET, and is approximately equal to ...

Page 4

PRELIMINARY - August 7, 2000 ELECTRICAL CHARACTERISTICS Unless specified: 0 < T < 125°C, VIN = 12V J PARAMETER SYMBO Supply Voltage Range VIN12V Supply Current (Quiescent) I High Side Driver Supply I BOOT Current (Quiescent) REFERENCE/VOLTAGE IDENTIFICATION Reference Voltage ...

Page 5

PRELIMINARY - August 7, 2000 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125°C, VIN = 12V J PARAMETER HYSTERETIC COMPARATOR Input Offset Voltage Input Bias Current Hysteresis Accuracy Hysteresis Setting DROOP COMPENSATION Initial Accuracy OVERCURRENT PROTECTION OCP Trip ...

Page 6

PRELIMINARY - August 7, 2000 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125°C, VIN12V = 12V J PARAMETER SYMBOL DRIVE REGULATOR DRV Voltage V Load Regulation Vldreg Short Circuit Current Ishort HIGH-SIDE OUTPUT DRIVER Peak Output Current Isrc ...

Page 7

PRELIMINARY - August 7, 2000 DYNAMIC ELECTRICAL CHARACTERISTICS Unless specified: 0 < T 125°C, VIN12V = 12V J < PARAMETER SYMBOL (1) HYSTERETIC COMPARATORS Propagation Delay Time t HCPROP from VSENSE to HIGHDR or LOWDR (excluding deadtime) (2) OUTPUT DRIVERS ...

Page 8

PRELIMINARY - August 7, 2000 DYNAMIC ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125° C, VIN12V = 12V J PARAMETER SYMBOL HIGH-SIDE Vds SENSING (Cont.) (1) POWER GOOD Comparator Propagation t Delay (1) SOFTSTART Comparator Propagation Delay (2) ...

Page 9

PRELIMINARY - August 7, 2000 TYPICAL PERFORMANCE CURVES 5V Efficiency 95% 93% 91% 89% 87% 85% 83% 81% 79% 77% 75 Regulation -1% -2% - © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS ...

Page 10

PRELIMINARY - August 7, 2000 TYPICAL PERFORMANCE CURVES (Cont.) 12V Efficiency 95% 93% 91% 89% 87% 85% 83% 81% 79% 77% 75 12V Regulation -1% -2% - © 2000 SEMTECH CORP. PROGRAMMABLE ...

Page 11

PRELIMINARY - August 7, 2000 BLOCK DIAGRAM © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE SC1155 11 ...

Page 12

PRELIMINARY - August 7, 2000 OUTPUT VOLTAGE TABLE 0 = VSS OPEN VID4 VID3 ...

Page 13

PRELIMINARY - August 7, 2000 FUNCTIONAL DESCRIPTION Reference/Voltage Identification The reference/voltage identification (VID) section con- sists of a temperature compensated bandgap refer- ence and a 5-bit voltage selection network. The 5 VID pins are TTL compatable inputs to the VID ...

Page 14

PRELIMINARY - August 7, 2000 FUNCTIONAL DESCRIPTION (cont.) resistor divider, and connected to the DROOP pin. Thus, under loaded conditions, VOUT is regulated to Vout = Vref • (1+R7/R8) - IOUT • R2/(R1+R2). Inhibit The inhibit pin is a TTL ...

Page 15

PRELIMINARY - August 7, 2000 APPLICATION CIRCUIT © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE SC1155 15 ...

Page 16

PRELIMINARY - August 7, 2000 MATERIALS LIST Quantity Reference C1-C4, C8, C11 3 C17-C19 7 C6,C7,C9,C12,C16,C20, C27 2 C13,C14 6 C21-C26 2 C10,C15 RA, ...

Page 17

PRELIMINARY - August 7, 2000 EVALUATION BOARD ARTWORK © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE TOP LAYER BOTTOM LAYER SC1155 17 ...

Page 18

PRELIMINARY - August 7, 2000 EVALUATION BOARD LAYOUT © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE TOP VIEW BOTTOM VIEW SC1155 18 ...

Page 19

PRELIMINARY - August 7, 2000 OUTLINE - SO-28 ECN00-1229 © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE SC1155 19 ...

Related keywords