S-8337AAHA-T8T1 datasheet, PDF

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S-8337AAHA-T8T1: DescriptionSwitching Controller, Voltage-mode, 0.16A, 1133kHz Switching Freq-Max, CMOS, PDSO8, TSSOP-8; CategoryPower/power management The power supply circuit; File Size554KB，49 Pages; ManufacturerABLIC

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S-8337AAHA-T8T1 Overview

Switching Controller, Voltage-mode, 0.16A, 1133kHz Switching Freq-Max, CMOS, PDSO8, TSSOP-8

S-8337AAHA-T8T1 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	ABLIC
Parts packaging code	SOIC
package instruction	TSSOP,
Contacts	8
Reach Compliance Code	compliant
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	VOLTAGE-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	6 V
Minimum input voltage	1.8 V
Nominal input voltage	3.3 V
JESD-30 code	R-PDSO-G8
length	4.4 mm
Number of functions	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	0.16 A
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Certification status	Not Qualified
Maximum seat height	1.1 mm
surface mount	YES
Switch configuration	SINGLE
Maximum switching frequency	1133 kHz
technology	CMOS
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	3 mm

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Rev.2.1

_01

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

SWITCHING REGULATOR CONTROLLERS

S-8337/8338 Series

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:

•

Oscillation frequency:

•

Maximum duty:

•

1.8 V to 6.0 V

286 kHz to 1.133 MHz (selectable by external resistor)

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

Soft-start function:

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.

8-pin SON(A), 8-pin TSSOP

Small package:

Applications

•

Power supplies for LCDs and CCDs

•

Power supplies for portable equipment

Packages

Package name

8-Pin SON(A)

8-Pin TSSOP

Package

PN008-A

FT008-A

Drawing code

Tape

PN008-A

FT008-E

Reel

PN008-A

FT008-E

Seiko Instruments Inc.

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