ST730 datasheet, PDF - EEWORLD Datasheet

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ST730: Description5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS; File Size183KB，9 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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ST730 Overview

5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS

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ST730A

5V STEP-DOWN,

CURRENT-MODE PWM DC-DC CONVERTERS

UP TO 450mA LOAD CURRENTS

200kHz HIGH-FREQUENCY

CURRENT-MODE PWM

85% TO 96% EFFICIENCIES

33µH OR 100µH 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

DIP-8

SO-8

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 0.3µA

in shutdown mode. The output does not exhibit

frequency over this specified range. Pulse-width

modulation (PWM) current-mode control provides

SCHEMATIC DIAGRAM

precise output regulation and excellent transient

responses.

Output

voltage

accuracy

guaranteed to be ±5% over line, load, and

temperature varations.

Fixed-frequency switching and absence of

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.

January 2003

1/9

ST730 Related Products

	ST730	ST730ACN	ST730AC	ST730ABN	ST730ABD	ST730ACD-TR	ST730A	ST730ABD-TR	ST730AB
Description	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS	5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS
Is it Rohs certified?	-	conform to	-	conform to	conform to	conform to	-	conform to	-
Parts packaging code	-	DIP	-	DIP	SOIC	SOIC	-	SOIC	-
package instruction	-	DIP, DIP8,.3	-	DIP, DIP8,.3	SO-8	SOP, SOP8,.25	-	SO-8	-
Contacts	-	8	-	8	8	8	-	8	-
Reach Compliance Code	-	compli	-	compli	compli	compli	-	compli	-
ECCN code	-	EAR99	-	EAR99	EAR99	EAR99	-	EAR99	-
Analog Integrated Circuits - Other Types	-	SWITCHING REGULATOR	-	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR	-	SWITCHING REGULATOR	-
control mode	-	CURRENT-MODE	-	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	-	CURRENT-MODE	-
Control Technology	-	PULSE WIDTH MODULATION	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	-	PULSE WIDTH MODULATION	-
Maximum input voltage	-	11 V	-	11 V	11 V	11 V	-	11 V	-
Minimum input voltage	-	4 V	-	4 V	4 V	4 V	-	4 V	-
Nominal input voltage	-	5 V	-	5 V	5 V	5 V	-	5 V	-
JESD-30 code	-	R-PDIP-T8	-	R-PDIP-T8	R-PDSO-G8	R-PDSO-G8	-	R-PDSO-G8	-
JESD-609 code	-	e3	-	e3	e4	e4	-	e4	-
Number of functions	-	1	-	1	1	1	-	1	-
Number of terminals	-	8	-	8	8	8	-	8	-
Maximum operating temperature	-	70 °C	-	85 °C	85 °C	70 °C	-	85 °C	-
Maximum output current	-	2 A	-	2 A	2 A	2 A	-	2 A	-
Package body material	-	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY	-
encapsulated code	-	DIP	-	DIP	SOP	SOP	-	SOP	-
Encapsulate equivalent code	-	DIP8,.3	-	DIP8,.3	SOP8,.25	SOP8,.25	-	SOP8,.25	-
Package shape	-	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	-	RECTANGULAR	-
Package form	-	IN-LINE	-	IN-LINE	SMALL OUTLINE	SMALL OUTLINE	-	SMALL OUTLINE	-
Peak Reflow Temperature (Celsius)	-	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED	260	-	NOT SPECIFIED	-
Certification status	-	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified	-	Not Qualified	-
Maximum seat height	-	4.8 mm	-	4.8 mm	1.75 mm	1.75 mm	-	1.75 mm	-
surface mount	-	NO	-	NO	YES	YES	-	YES	-
Switch configuration	-	BUCK	-	BUCK	BUCK	BUCK	-	BUCK	-
Maximum switching frequency	-	220 kHz	-	280 kHz	280 kHz	220 kHz	-	280 kHz	-
technology	-	CMOS	-	CMOS	CMOS	CMOS	-	CMOS	-
Temperature level	-	COMMERCIAL	-	INDUSTRIAL	INDUSTRIAL	COMMERCIAL	-	INDUSTRIAL	-
Terminal surface	-	Matte Tin (Sn)	-	Matte Tin (Sn)	Nickel/Palladium/Gold (Ni/Pd/Au)	Nickel/Palladium/Gold (Ni/Pd/Au)	-	Nickel/Palladium/Gold (Ni/Pd/Au)	-
Terminal form	-	THROUGH-HOLE	-	THROUGH-HOLE	GULL WING	GULL WING	-	GULL WING	-
Terminal pitch	-	2.54 mm	-	2.54 mm	1.27 mm	1.27 mm	-	1.27 mm	-
Terminal location	-	DUAL	-	DUAL	DUAL	DUAL	-	DUAL	-
Maximum time at peak reflow temperature	-	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED	30	-	NOT SPECIFIED	-
width	-	7.62 mm	-	7.62 mm	3.9 mm	3.9 mm	-	3.9 mm	-

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Shortcut: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ

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