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參數(shù)資料
| 型號： | SC1476 |
| 廠商： | Semtech Corporation |
| 英文描述： | Portable IMVP-IV Dual Phase Power Supply Controller |
| 中文描述： | 便攜式IMVP的第四雙相電源控制器 |
| 文件頁數(shù)： | 1/1頁 |
| 文件大小： | 91K |
| 代理商： | SC1476 |
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www.semtech.com
SC1476
Portable IMVP-IV Dual Phase
Power Supply Controller
POWER MANAGEMENT
Description
The SC1476 PowerStep IV IC is a single chip high-per-
formance hysteretic PWM controller. With its integrated
SmartDriver, it powers advanced IMVP-IV processors.
The SC1476 features extended Intel
Mobile Voltage Po-
sitioning (IMVP) to increase battery life by reducing the
voltage at the processor when it is heavily loaded. It
directly supports Intel
SpeedStep processors for even
longer battery life. The SC1476 fully supports Intel’s
Geyserville-III core voltage specification. It provides di-
rect “deeper sleep” mode and boot voltage support.
Automatic “power-save” is present to prevent negative
current flow in the low-side FET during light loading con-
ditions, saving even more power. The high side driver ini-
tially turns on with a weak drive to reduce ringing, EMI,
and capacitive turn-on of the low side.
Revision 7, December 2002
Features
IMVP-IV compliant single chip solution
High speed hysteretic controller
6 bit VID programmable output
Integrated drivers with soft high side turn-on
Programmable softstart
Programmable boot voltage
Programmable DeeperSleep voltage
Dynamic phase current matching
Under-voltage lockout on VccA
Over-voltage protection on CORE
Current Limit protection on CORE
Thermal protection
Powergood flag with blanking during VID or
DeeperSleep mode changes
Automatic powersave at light load
Slew rate limited DAC
TSSOP-38 package
Applications
Typical Application Circuit
A 6-bit DAC, accurate to 0.85%, sets the output voltage
reference and implements the 0.700V to 1.708V range
required by the processor. The hysteretic converter uses
a comparator without an error amplifier thereby provid-
ing the fastest possible transient response while avoid-
ing the stability issues inherent to classical PWM control-
lers. The DAC is externally slew rate limited to minimize
transient currents and audible noise.
The SC1476 operates from 3Vdc and 5Vdc and also fea-
tures soft-start, an open-drain PWRGD signal with power-
good blanking, and an enable input. Programmable cur-
rent limiting shuts down the SC1476 after 32 current
limit pulses. In addition, it comes in a space-saving
TSSOP-38 package.
CONTROLLER
VID[5:0]
Lo
+VCORE
+V_IN
+V_5
Up to 40A
Logic
Controller
Signals
Driver
Multiplexer
Lo
Co
Driver
Rcs
Rcs
+V_3
+V_VID
Controller
SC1474
Dual Phase
Extended IMVP
0.600V-1.75V
Extended
IMVP
PWM
Power
Control
Smart
VID
Smart
VID
Regulator
Notebook and Laptop computers
Requests for a complete datasheet and
additional product information should be
directed to sales@semtech.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1476ITS.TR | 制造商:Semtech Corporation 功能描述: |
| SC1476ITS.TRT | 制造商:SEMTECH 功能描述:I.C. |
| SC1476ITSTRT | 制造商:Semtech Corporation 功能描述:DC DC Cntrlr Single-OUT 3V/5V Input 38-Pin TSSOP T/R 制造商:Semtech Corporation 功能描述:Controller IC Leaded Process Compatible: 制造商:Semtech Corporation 功能描述:SC Series SMT Portable IMVP-IV Dual Phase Power Supply Controller - TSSOP-38 |
| SC-1477 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CRYSTAL CLOCK OSCILLATORS |
| SC1477ITSTRT | 制造商:Semtech Corporation 功能描述:IC, CPU POWER SUPPLY, 24-TSSOP, IC Function:CPU Power Supply IC, Brief Features: |
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