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參數資料
| 型號： | SC2516MLTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Complete Three-in-One DDR Power Solution With BF_CUT |
| 中文描述： | 完成三項合一DDR電源解決方案與BF_CUT |
| 文件頁數： | 1/15頁 |
| 文件大小： | 273K |
| 代理商： | SC2516MLTRT |
POWER MANAGEMENT
Description
1
www.semtech.com
SC2516
Complete Three-in-One DDR
Power Solution With BF_CUT
Features
Applications
Revision 8, May. 2005
Typical Application Circuit
The SC2516 is a fully integrated, Three-in-One DDR Con-
troller supplying power to the VDDQ, VTT and GMCH
rails. Two synchronous buck controller provide the VDDQ
and GMCH at high efficiency, while an internal linear regu-
lator supplies the termination voltage with 1.8A(min)
Source/Sink capability.
The SC2516 uses the Intel
defined Latched BF_Cut
signal to comply with motherboard state transitions. The
regulator uses the 5VDUAL rail to supply VDDQ under all
motherboard states, via the VDDQ switcher. The GMCH
regulator is slaved off the 5V main regulator, using a sepa-
rate UVLO on that rail. Additional logic and supervisory
circuitry complete the functionality of this single chip DDR
power solution in compliance with ACPI requirements.
The MLP package with a copper pad provides excellent
thermal impedance while keeping small footprint. VDDQ
short circuit protection along with VTT current limit as
well as two independent thermal shutdown circuits as-
sure safe operation under all fault conditions.
Power Solution for DDR memory per Intel
motherboard specification
High speed data line termination
Uses Latched BF_Cut from Intel
Glue Chip to
control regulators
External VDDQ divider allows DDRI or DDRII Com-
patibility
High efficiency VDDQ switcher
External GMCH divider allows 1.5V or 1.25V pro-
gramming
High efficiency GMCH switcher supplies pro-
grammed output from the 5V or 3.3V rail
Single chip solution complies fully with ACPI power
sequencing specifications
1.8A (min) VTT Source/Sink capability
High current 1Amp gate driver for VDDQ switcher
Independent thermal shutdown for VTT
Fast transient response
Space saving 22-pin MLP package with copper
thermal pad for heatsinking to PC Board
VDDQ
3VCC
5VSBY
GMCH
VTT
12VCC
FB_GMCH
FBVDDQ
FBVDDQ
VDDQ
Latched BF_CUT
SC2516
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2
COMP
FBVDDQ
SS/EN
VTTGND
VTT
VDDQ
AGND
VTTFB
REFSENS
FB_GMCH
SS_GMCH
POK
GND_GMCH
BG_GMCH
TG_GMCH
BF_CUT
COMP_GMCH
5VSBY
BST
TG
BG
PGND
T
ATXPWR_OK
VDDQ
FB_GMCH
5Vdual
SS/EN
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