stk740-411 Sanyo Semiconductor Corporation, stk740-411 Datasheet

no-image

stk740-411

Manufacturer Part Number
stk740-411
Description
3.3v/5a Single Output Separate Excitation Chopper Regulator
Manufacturer
Sanyo Semiconductor Corporation
Datasheet
Overview
The STK740-441 is a separate-excitation step-down
chopper regulator hybrid IC for the secondstage circuit
and optimal as a 3.3V local power supply for use in logic
circuit that includes both 5V and 3.3V systems. This IC
incorporates in the package all the necessary circuits for
a chopper regulator including power switch, error
amplifier, soft start, shutdown type output short protec-
tion, low-voltage malfunction prevention, on/off, and
snubber circuits. Therefore, external components re-
quired are input and output capacitors and choke coil
only and this allows this IC to be used to construct a
large-current (5A) chopper regulator as if a 3-pin regula-
tor were used.
Applications
Features
Ordering number:EN6106
• 3.3V local power supply for the logic circuit where
• Adoption of Sanyo IMST ; Insulated Metal Substrate
• Slim package reduces mounting space.
• Typical efficiency of 88% at DC 5V input, 2.5A output.
• Fine adjustment of output voltage enable.
• 50 kHz operating frequency.
• Low-R
• Low-V
both 5V and 3.3V systems are constructed togeter.
Technology, allows the circuit to be operated without
using a heat sink (see “No Fin Output Current Derat-
ing” chart in the page 6).
ON
F
Schottky barrier diode adopted.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
resistance power MOSFET adopted.
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
SANYO Electric Co.,Ltd. Semiconductor Company
3.3V/5A Single Output Separate Excitation
Package Dimensions
unit:mm
4171-SIP12
1
11 2.54=27.94
2.54
37.0
Chopper Regulator
[STK740-441]
12
0.5
STK740-441
63099RM (KT) No.6106–1/10
Thick Film Hybrid IC
4.5
2.9
SANYO : SIP-12

Related parts for stk740-411

stk740-411 Summary of contents

Page 1

... Ordering number:EN6106 3.3V/5A Single Output Separate Excitation Overview The STK740-441 is a separate-excitation step-down chopper regulator hybrid IC for the secondstage circuit and optimal as a 3.3V local power supply for use in logic circuit that includes both 5V and 3.3V systems. This IC incorporates in the package all the necessary circuits for ...

Page 2

... This product is listed in a product series due to its property such as output voltage, output current, package, and other similar items. Since some prducts listed in the table below is under development, please refer to your Sanyo sales representative for details. Type number Input voltage STK740-411 STK740-420 STK740-441 ...

Page 3

... STK740-441 TR1 Snubber circuit Error amplifier PWM Phase compensation On/off circuit Soft start circuit Short protection circuit Description ’ F ’ OUT 9 ...

Page 4

... In a constant-voltage power supply circuit output voltage may generally exceed the stipulated rating (equivalent to input voltage) when the circuit is broken down or the IC and the printed circuit board is wrongly soldered. Therefore overvoltage protection circuit is recommended to use to minimize the damages caused by the overvoltage. FUSE DC INPUT SCR GND STK740-441 ...

Page 5

... Sample Characteristics 25˚C, in the test circuit 3.6 3.5 3.4 3.3 3.2 3.1 3 100 STK740-441 Output Voltage vs.Output Current Output Current Io[A] Efficiency vs.Output Current Output Current Io[ No.6106–5/10 ...

Page 6

... Output Voltage vs.Input Voltage 3.6 3.5 3.4 3.3 3.2 3.1 3 6.0 5.0 4.0 3.0 2.0 1.0 0.0 - Ambient Temperature Ta[ C] STK740-441 5 6 Input Voltage V [ Fin Output Current Derating = = 100 No.6106–6/10 ...

Page 7

... No Fin Power Dissipation vs Output Current 4.0 3.0 2.0 1.0 0 STK740-441 Tc vs.Output Current 3 4 Output Current Io[ Output Current Io[ No.6106–7/10 ...

Page 8

... Connect GND pin (pin 5) with the input capacitor (–) or the output capacitor (–). However, connect with the output capacitor (–) unless otherwise specified. 5 Shorten the length of the line between the input capacitor (–) and the output capacitor (–) as well as possible. 6 Connect V pin (pin 2) with the output capacitor (+). S STK740-441 ...

Page 9

... Perspective Wiring Layout (from soldered side) R6 IC1 C1a C1b VIN GND C1c CN1 C8 Circuit Pattern (soldered side) STK740-441 R5 R1R2 FB1 C2c L1 C9 C2a C2b STK740-400 TEST S-GND ON/OFF R3 +Vs +Vo GND CN 2 No.6106–9/10 ...

Page 10

... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of June, 1999. Specifications and information herein are subject to change without notice. STK740-441 PS No.6106–10/10 ...

Related keywords