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參數資料
| 型號： | 935269482115 |
| 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： | 12/20頁 |
| 文件大小： | 331K |
| 代理商： | 935269482115 |
Philips Semiconductors
Product data
SA57250-XX
CMOS switching regulator (PWM controlled)
2
2001 Aug 01
853–2270 26807
GENERAL DESCRIPTION
The SA57250-XX is a fully integrated DC/DC converter circuit built
with CMOS technology. It uses a pulse width modulation (PWM)
controlled switching regulator circuit for low ripple and high efficiency
(typically 83%). The regulator has a high precision output with
±2.4% accuracy. Few external components are required.
The SA57250 has an ON/OFF control that may be used to turn off
the converter and conserve power in battery powered applications.
Power off supply current is no more than 0.5
A. A built-in, soft-start
circuit reduces current inrush and voltage overshoot during start up.
A low resistance CMOS power FET, with 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
ON/OFF power control
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
SL01461
2
VREF
5
4
VOUT
VBATT
SA57250-XX
ON/OFF
GND
SW
FB
PWM CONTROL
SOFT START
1
R
SA57250-XX as a boost (step-up) converter.
VDD
Figure 1. Simplified system diagram.
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| 935269477115 | 0.3 A SWITCHING REGULATOR, 57.5 kHz SWITCHING FREQ-MAX, PDSO5 |
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| 935269486115 | SWITCHING CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDSO5 |
| 935269487115 | SWITCHING CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDSO5 |
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