ST730AB datasheet, PDF - EEWORLD Datasheet

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ST730AB: Description5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS; File Size183KB，9 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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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

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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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