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SA57255-XX

Features: • Operates from 0.7 to 9 VDC• Ultra low operating supply current-typically 17 mA• Uses external power BJT• High efficiency-typically 83%• High precision output-typically ±2.4%• Operating temperature range of 40 to +85 °C• Available output voltage...

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SA57255-XX: Features: • Operates from 0.7 to 9 VDC• Ultra low operating supply current-typically 17 mA• Uses external power BJT• High efficiency-typically 83%• High precision outpu...

SA57255-XX Data Sheet

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Part Number:
SA57255-XX
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/26

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Product Details

Description



Features:

• Operates from 0.7 to 9 VDC
• Ultra low operating supply current-typically 17 mA
• Uses external power BJT
• 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 VDC
• Available in SOT23-5 surface mount package


Application

• Mobile and portable phones
• Instrumentation and industrial products
• Other portable, battery-operated equipment


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER
MIN.
MAX.
UNIT
VFB FB pin voltage
-0.3
11
V
VDD(MAX) Power supply voltage
-0.3
11
V
VDRIVE DRIVE pin voltage
-30
11
V
IDRIVE DRIVE pin current
-
300
mA
TOPRE Operating temperature
-40
+85
°C
Tstg Storage temperature
-40
+125
°C
PD Power dissipation
-
150
mW



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 SA57255-XX 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 of SA57255-XX 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.




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