參數(shù)資料
型號: 935269501115
廠商: NXP SEMICONDUCTORS
元件分類: 穩(wěn)壓器
英文描述: 0.3 A SWITCHING CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDSO5
封裝: 1.50 MM, PLASTIC, MO-178, SOT-25, SOT-23, SOP-5
文件頁數(shù): 11/21頁
文件大?。?/td> 301K
代理商: 935269501115
Philips Semiconductors - PIP - SA57255-XX; CMOS switching regulator (PWM controlled)
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Product Information
SA57255-XX; CMOS
switching regulator
(PWM controlled)
Information as of 2002-08-07
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Block diagram
Parametrics
topGeneral description
The SA57255-XX is a highly integrated DC/DC converter circuit. Efficient, compact power conversion is
achieved with a pulse width modulation (PWM) controlled switching regulator circuit designed using
CMOS processing. Low ripple and high efficiency of typically 83% are achieved through PWM control. The
regulator has a high precision output with ±2.4% accuracy. Few external components are required. The
SA57255-XX has a built-in, soft-start circuit to reduce current inrush and voltage overshoot during start up.
The PWM control circuit is designed to drive an external low resistance NPN bipolar junction transistor
(BJT). The DRIVE output provides typically 7 mA at 100 kHz typical switching frequency to drive the BJT.
topFeatures
q
Operates from 0.7 to 9 V DC
q
Ultra low operating supply current-typically 17 uA
q
Uses external power BJT
q
High efficiency-typically 83%
q
High precision output-typically ±2.4%
q
Operating temperature range of -40 to +85 °C
q
Available output voltages: 2.0, 2.5, 2.8, 3.0, 3.3, 3.6, 5.0 V DC
q
Available in SOT23-5 surface mount package
topApplications
q
Mobile and portable phones
q
Instrumentation and industrial products
q
Other portable, battery-operated equipment
file:///G|/imaging/BITTING/cpl_IMAGES/PhilipsSe...55-XX;CMOSswitchingregulator(PWMcontrolled).htm (1 of 3) [Aug-28-2002 9:22:45 AM]
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