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參數資料
| 型號： | 935269491115 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.3 A SWITCHING REGULATOR, 57.5 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | 1.50 MM, PLASTIC, MO-178, SOT-25, SOT-23, SOP-5 |
| 文件頁數： | 12/21頁 |
| 文件大?。?/td> | 333K |
| 代理商： | 935269491115 |
Philips Semiconductors
Product data
SA57254-XX
CMOS switching regulator (PWM controlled)
2
2001 Aug 01
853–2272 26807
GENERAL DESCRIPTION
The SA57254-XX is a fully 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 SA57254-XX has a built-in soft-start circuit which reduces
inrush current and voltage overshoot during start-up. A low
resistance CMOS power FET, which has low leakage current and
low parasitic capacitance, is on-chip.
FEATURES
Operates from 0.7 to 9 V
DC
Ultra low operating supply current—typically 17 A
Built-in power FET
High efficiency—typically 83%
High precision output—typically ±2.4%
Operating temperature range of –40 to +85 °C
Available output voltages: 2.0, 2.5, 2.8, 3.0, 3.3, 3.6, 5.0 V
DC
Available in SOT23-5 surface mount package
APPLICATIONS
Mobile and portable phones
Instrumentation and industrial products
Other portable, battery-operated equipment
SIMPLIFIED SYSTEM DIAGRAM
SL01501
1
VREF
5
4
VOUT
VBATT
SA57254-XX
GND
SW
FB
PWM CONTROL
SOFT START
2
R
SA57254-XX as a boost (step-up) converter.
VDD
Figure 1. Simplified system diagram.
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