ST735S datasheet, PDF - EEWORLD Datasheet

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ST735S: Description300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR; File Size359KB，11 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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ST735S Overview

300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR

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ST735S

ST735T

300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT

CURRENT-MODE PWM REGULATOR

CONVERTS +4.0V TO + 6.2V INPUT TO -5V

OUTPUT (735S) OR +3.5V TO + 9.0V TO A

NEGATIVE ADJUSTABLE OUTPUT (735T)

1W GUARANTEED OUTPUT POWER

72% TYPICAL EFFICIENCY

0.8mA QUIESCENT CURRENT

1µA SHUTDOWN MODE

300KHZ FIXED FREQUENCY OSCILLATOR

CURRENT MODE PWM CONVERTER

LOW NOISE AND JITTER

SOFT START

SIMPLE APPLICATION CIRCUIT

UNDERVOLTAGE LOCKOUT (735S)

DIP-8

SO-8

DESCRIPTION

The ST735S/ST735T is a Bi-CMOS, inverting

switch mode DC-DC regulator with internal Power

MOSFET that generates a fixed -5V (S version) or

a negative adjustable (T version) output voltage

from a 4V (3.5V for the 735T) to 6.2V input voltage

(9V for the 735T); is guaranteed an output current

of 200mA for inputs greater than 4.5V. The

quiescent current for this device is typically of

SCHEMATIC DIAGRAM

-O

0.8mA and, in shutdown mode it is reduced to

1µA.

These power-conserving features, along with high

efficiency and applications circuits, thaT lend itself

to minaturization, make the ST735S/ST735T

excellent in a broad range of on-card, HDD and

portable equipment applications. These device

employ a high performance current mode pulse

with modulation (PWM) control scheme to provide

tight output voltage regulation and low noise. The

fixed frequency oscillator is factory trimmed to

300KHz, allowing for easy noise filtering. The

regulator in production is tested to guarantee an

output accuracy within ±5% over all specified

conditions.

October 2002

1/11

ST735S Related Products

	ST735S	ST735TCD-TR	ST735T	ST735SCD-TR	ST735TCN	ST735TCD	ST735SCN
Description	300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR	300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR	300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR	300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR	300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR	300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR	300kHz, -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT-MODE PWM REGULATOR
Is it lead-free?	-	Lead free	-	-	Lead free	Lead free	Lead free
Is it Rohs certified?	-	conform to	-	conform to	conform to	conform to	conform to
Maker	-	STMicroelectronics	-	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Parts packaging code	-	SOIC	-	SOIC	DIP	SOIC	DIP
package instruction	-	SOP, SOP8,.25	-	SOP, SOP8,.25	DIP, DIP8,.3	SOP, SOP8,.25	DIP, DIP8,.3
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	-	6.2 V	-	6.2 V	6.2 V	6.2 V	6.2 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-PDSO-G8	-	R-PDSO-G8	R-PDIP-T8	R-PDSO-G8	R-PDIP-T8
JESD-609 code	-	e4	-	e4	e3	e4	e3
Number of functions	-	1	-	1	1	1	1
Number of terminals	-	8	-	8	8	8	8
Maximum operating temperature	-	125 °C	-	125 °C	125 °C	125 °C	125 °C
Minimum operating temperature	-	-40 °C	-	-40 °C	-40 °C	-40 °C	-40 °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	-	SOP	-	SOP	DIP	SOP	DIP
Encapsulate equivalent code	-	SOP8,.25	-	SOP8,.25	DIP8,.3	SOP8,.25	DIP8,.3
Package shape	-	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE	-	SMALL OUTLINE	IN-LINE	SMALL OUTLINE	IN-LINE
Peak Reflow Temperature (Celsius)	-	260	-	NOT SPECIFIED	NOT SPECIFIED	260	NOT SPECIFIED
Certification status	-	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1.75 mm	-	1.75 mm	4.8 mm	1.75 mm	4.8 mm
surface mount	-	YES	-	YES	NO	YES	NO
Switch configuration	-	BUCK-BOOST	-	BUCK-BOOST	BUCK-BOOST	BUCK-BOOST	BUCK-BOOST
Maximum switching frequency	-	300 kHz	-	300 kHz	300 kHz	300 kHz	300 kHz
technology	-	BICMOS	-	BICMOS	BICMOS	BICMOS	BICMOS
Temperature level	-	AUTOMOTIVE	-	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE
Terminal surface	-	Nickel/Palladium/Gold (Ni/Pd/Au)	-	Nickel/Palladium/Gold (Ni/Pd/Au)	Matte Tin (Sn)	Nickel/Palladium/Gold (Ni/Pd/Au)	Matte Tin (Sn)
Terminal form	-	GULL WING	-	GULL WING	THROUGH-HOLE	GULL WING	THROUGH-HOLE
Terminal pitch	-	1.27 mm	-	1.27 mm	2.54 mm	1.27 mm	2.54 mm
Terminal location	-	DUAL	-	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	30	-	NOT SPECIFIED	NOT SPECIFIED	30	NOT SPECIFIED
width	-	3.9 mm	-	3.9 mm	7.62 mm	3.9 mm	7.62 mm

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