ST730ACDTR STMicroelectronics, ST730ACDTR Datasheet

IC CONV DC/DC PWM 5V STPDN 8SOIC

ST730ACDTR

Manufacturer Part Number
ST730ACDTR
Description
IC CONV DC/DC PWM 5V STPDN 8SOIC
Manufacturer
STMicroelectronics
Type
Step-Down (Buck)r
Datasheet

Specifications of ST730ACDTR

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
4.75 ~ 5.25 V
Current - Output
450mA
Frequency - Switching
160kHz ~ 280kHz
Voltage - Input
4 ~ 11 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Power - Output
344mW
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
497-4315-2
DESCRIPTION
The ST730A is a 5V output CMOS, step-down
switching regulator. The ST730A accepts inputs
between 5.2V and 11V and delivers 450mA.
Typical efficiencies are 85% to 96%.
Quiescent supply current is 0.8mA and only 0.3 A
in shutdown mode. The output does not exhibit
frequency over this specified range. Pulse-width
modulation (PWM) current-mode control provides
SCHEMATIC DIAGRAM
January 2003
UP TO 450mA LOAD CURRENTS
200kHz HIGH-FREQUENCY
CURRENT-MODE PWM
85% TO 96% EFFICIENCIES
33 H OR 100 H PRE-SELECTED
INDUCTOR VALUE, NO COMPONENT
DESIGN REQUIRED
0.8mA QUIESCENT CURRENT
0.3µA SHUTDOWN SUPPLY CURRENT
ADJUSTABLE OUTPUT VOLTAGE
OVERCURRENT, SOFT-START AND
UNDERVOLTAGE LOCKOUT PROTECTION
CYCLE-BY-CYCLE CURRENT LIMITING
PACKAGE AVAILABLE: DIP-8 AND SO-8
CURRENT-MODE PWM DC-DC CONVERTERS
precise output regulation and excellent transient
responses.
guaranteed to be ±5% over line, load, and
temperature varations.
Fixed-frequency
subharmonic ruipple allows easy filtering of output
ripple and noise, as well as the use of small
external components. This regulators require only
a single inductor value to work in most
applications, so no inductor design is necessary.
Typical applications are: Cellular phones & radios,
portable Instruments, Portable Communications
Equipments and Computer Peripherals.
DIP-8
Output
switching
5V STEP-DOWN,
voltage
and
ST730A
SO-8
accuracy
absence
1/9
of
is

Related parts for ST730ACDTR

ST730ACDTR Summary of contents

Page 1

CURRENT-MODE PWM DC-DC CONVERTERS UP TO 450mA LOAD CURRENTS 200kHz HIGH-FREQUENCY CURRENT-MODE PWM 85% TO 96% EFFICIENCIES 100 H PRE-SELECTED INDUCTOR VALUE, NO COMPONENT DESIGN REQUIRED 0.8mA QUIESCENT CURRENT 0.3µA SHUTDOWN SUPPLY CURRENT ADJUSTABLE OUTPUT VOLTAGE OVERCURRENT, ...

Page 2

ST730A ABSOLUTE MAXIMUM RATINGS Symbol V DC Input Voltage CC V Switch Pin Voltage LX V Shutdown Voltage (SHDN) SHDN V ,V Soft Start (SS) and Compensation Capacitor (CC) Pins Voltage Switching Peak Current LX I Reference ...

Page 3

CONNECTION DIAGRAM (top view) PIN DESCRIPTION Pin N° Symbol 1 SHDN 2 REF OUT 6 GND Name and Function Shutdown control (active low): If connected to GND the IC is ...

Page 4

ST730A ELECTRICAL CHARACTERISTICS (V Symbol Parameter V Input Voltage CC V Output Voltage O V Line Regulation O V Load Regulatio O Power Efficency I Supply Current SUPPLY V SHDN Input High Threshold IH V SHDN Input Low Threshold IL ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified T Figure 1 : Efficency vs Output Current Figure 2 : Supply Current vs Temperature Figure 3 : Oscillator Frequency vs Temperature = 25°C j Figure 4 : Oscillator Frequency vs Input Voltage Figure ...

Page 6

ST730A Figure 7 : Switching Waveforms, Continuous Conduction V =6V to 11V, I =300mA I O Figure 8 : Switching Waveforms, Discontinuous Conduction V =6V to 11V, I =300mA I O 6/9 Figure 9 : Line Transient Figure 10 : ...

Page 7

Plastic DIP-8 MECHANICAL DATA mm. DIM. MIN. TYP A 3.3 a1 0.7 B 1.39 B1 0.91 b 0 8.8 e 2.54 e3 7. 3.3 Z 0.44 inch MAX. MIN. TYP. 0.130 ...

Page 8

ST730A DIM. MIN. A 1.35 A1 0.10 A2 1.10 B 0.33 C 0.19 D 4. 5.80 h 0.25 L 0.40 k ddd 8/9 SO-8 MECHANICAL DATA mm. TYP MAX. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 ...

Page 9

... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications entioned in this publication are subject to change without notice. This publication supersedes and replaces all information eviously supplied ...

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