S8337 datasheet(1/51 Pages) SII

Part #	S8337

Description	STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER

PDF	51 Pages

Scroll/Zoom	100%

Manufacturer	SII [Seiko Instruments Inc]

Direct Link	http://www.sii.co.jp

Logo

1 / 51 page

S-8337/8338 Series

www.sii-ic.com

STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL

SWITCHING REGULATOR CONTROLLER

Rev.4.0_01

1

The S-8337/8338 Series is a CMOS step-up switching regulator which mainly consists of a reference voltage

circuit, an oscillator, an error amplifier, a PWM controller, an under voltage lockout circuit (UVLO), and a timer

latch short-circuit protection circuit. Because its minimum operating voltage is as low as 1.8 V, this switching

regulator is ideal for the power supply of an LCD or for portable systems that operate on a low voltage. The

internal oscillation frequency can be set up to 1.133 MHz, via the resistor connected to the ROSC pin.

With the S-8337 Series, the maximum duty ratio of PWM control can be controlled by the resistor connected to

the RDuty pin. With the S-8338 Series, the maximum duty ratio is fixed (to 88%). The phase compensation

and gain value can be adjusted according to the values of the resistor and capacitor connected to the CC pin.

Therefore, the operation stability and transient response can be correctly set for each application. The

reference voltage accuracy is as high as 1.0 V

±1.5%, and any voltage can be output by using an external

output voltage setting resistor.

In addition, the delay time of the short-circuit protection circuit can be set by using the capacitor connected to

the CSP pin. If the maximum duty condition continues because of short-circuiting, the capacitor externally

connected to the CSP pin is charged, and oscillation stops after a specific time. This condition is cleared by

re-application of power or by setting the switching regulator (S-8338 Series) to the shutdown status. A ceramic

capacitor or a tantalum capacitor is used as the output capacitor, depending on the setting. This controller IC

allows various settings and selections and employs a small package, making it very easy to use.



Features

• Low voltage operation:

1.8 V to 6.0 V

• Oscillation frequency:

286 kHz to 1.133 MHz (selectable by external resistor)

• Maximum duty:

47 to 88.5% (selectable by external resistor) (S-8337 Series)

Fixed to 88% typ. (S-8338 Series)

• Reference voltage:

1.0 V

±1.5%

• UVLO (under-voltage lockout) function:

Detection voltage can be selected from between 1.5 V and 2.3 V in 0.1 V steps.

Hysteresis width can be selected from between 0.1 V and 0.3 V in 0.1 V steps.

• Timer latch short-circuit protection circuit:

Delay time can be set using an external capacitor.

• Soft-start function:

Soft-start time can be selected in three steps, 10 ms, 15 ms, and 20 ms.

• Phase compensation external setting:

Adjustable by connecting resistor and capacitor in series to GND.

• Shutdown function:

S-8338 Series, shutdown current consumption: 1.0

μA max.

• Lead-free, Sn 100%, halogen-free*1

*1. Refer to “ Product Name Structure” for details.



Applications

• Power supplies for LCDs and CCDs

• Power supplies for portable equipment



Packages

• 8-Pin SON(A)

• 8-Pin TSSOP

Similar Part No. - S8337

Manufacturer	Part #	Datasheet	Description
Nihon Kaiheiki Industry...	S833	165Kb / 4P	High Capacity Standard Size Toggles
Roithner LaserTechnik G...	S83300MG	588Kb / 5P	multi mode
Roithner LaserTechnik G...	S8330MG	388Kb / 5P	Infrared Laser Diode
Satco Products, Inc.	S8331	123Kb / 1P	13 watt; pin-based Compact Fluorescent; 3500K; 82 CRI; G24Q-1 (4-Pin) base
Seiko Instruments Inc	S8333	2Mb / 44P	STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER

More results

Similar Description - S8337

Manufacturer	Part #	Datasheet	Description
Intersil Corporation	EL7515	316Kb / 9P	High Frequency PWM Step-Up Regulator May 13, 2005
Intersil Corporation	EL7515	179Kb / 9P	High Frequency PWM Step-Up Regulator August 10, 2007
Seiko Instruments Inc	S-8365	1Mb / 63P	STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
	S8363	2Mb / 50P	STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM / PFM SWITCHABLE SWITCHING REGULATOR
	S8365	3Mb / 63P	STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Renesas Technology Corp	EL7515	492Kb / 9P	High Frequency PWM Step-Up Regulator
Renesas Technology Corp	EL7512	501Kb / 8P	High Frequency PWM Step-Up Regulator
ABLIC Inc.	S-8337	452Kb / 45P	STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.5.0_00
	S-8363	792Kb / 50P	STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM / PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_02
	S-8365	1Mb / 63P	STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Rev.2.1_02

More results

S8337 Datasheet(PDF) 1 Page - Seiko Instruments Inc

S8337 Datasheet(HTML) 1 Page - Seiko Instruments Inc

Similar Part No. - S8337

Similar Description - S8337

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Datasheet Download

Link URL