參數(shù)資料
型號: FAN5037M_NL
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, PDSO8
封裝: LEAD FREE, SOIC-8
文件頁數(shù): 1/11頁
文件大?。?/td> 101K
代理商: FAN5037M_NL
www.fairchildsemi.com
REV. 1.0.3 9/26/01
Features
High power switch-mode DC-DC controller can provide
in excess of 13A
Output voltage adjustable from 1.2V to 3.6V
85% efciency
Cumulative accuracy < 3% over line, load, and
temperature variations
Overvoltage and short circuit protection
Built-in soft start
No overshoot at turn-on
Applications
I/O and AGP power for desktop computers
High efciency power for ASICs
High efciency power for DSPs
Adjustable step-down power supplies
Description
The FAN5037 is a high power, switch-mode DC-DC control-
ler that provides efcient power for all low-voltage applica-
tions. This controller has a built-in Soft Start feature which
offers system protection during power-up by reducing both
inrush current and output overshoot. When combined with
the appropriate external circuitry, the FAN5037 can deliver
load currents as high as 13A at efciencies as high as 88%.
The FAN5037 can generate output voltages from 1.2V up to
3.6V using external resistors.
The FAN5037 is designed to operate in a constant on-time
control mode under all load conditions. Its accurate low TC
reference eliminates the need for precision external compo-
nents in order to achieve the tight tolerance voltage regula-
tion required by many applications. Short circuit current
protection is provided through the use of a current sense
resistor, while overvoltage protection is provided internally.
Block Diagram
Feedback Control
Oscillator
Digital Logic
FAN5037
1.20V
Reference
Vout
+12V
5V
+5V
1
CEXT
VCCA 2
IFBL 4
IFBH 3
VCCP 8
7
DRV
GNDP 6
VFB 5
FAN5037
Adjustable Switching Regulator Controller
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