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S-8352D33MC-K8ST2G

Description
IC reg ctrlr bst pwm sot23-5
Categorysemiconductor    Power management   
File Size547KB,51 Pages
ManufacturerSeiko
Environmental Compliance  
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S-8352D33MC-K8ST2G Overview

IC reg ctrlr bst pwm sot23-5

S-8352D33MC-K8ST2G Parametric

Parameter NameAttribute value
Datasheets
S835(1,2) Series
Product Photos
SOT25
Standard Package3,000
CategoryIntegrated Circuits (ICs)
FamilyPMIC - Voltage Regulators - DC DC Switching Controllers
PackagingTape & Reel (TR)
PWM TypeControlle
Number of Outputs1
Frequency - Max110kHz
Duty Cycle80%
Voltage - Supply0.9 V ~ 10 V
BuckN
BoosYes
FlybackN
InvertingN
DoubleN
DivideN
CukN
IsolatedN
Operating Temperature-40°C ~ 85°C
Package / CaseSC-74A, SOT-753
S-8351/8352 Series
www.sii-ic.com
© Seiko Instruments Inc., 2002-2010
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING
REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0
_00
The S-8351/8352 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage
source, an oscillation circuit, a comparator and PFM control circuit. The PFM control circuit allows the duty ratio to be
automatically switched according to the load (at light load : 50%, at high output current : 75%), enabling products with a low
ripple over a wide range, high efficiency, and high output current (A, B, and D type). Products with a fixed duty ratio of 75%
are also available (C type).
The S-8351 Series can configure a step-up switching regulator with an external coil, capacitor, and diode. A protection
circuit turns off the built-in MOS FET when the voltage at the CONT pin exceeds the limit to prevent it from being damaged.
In addition to the above features, the small package and low current consumption, makes the S-8351 Series ideal for
applications such as the power supply unit of portable equipment.
The S-8352 Series, which features an external transistor, is suitable for applications requiring a high output current.
Features
• Low voltage operation : Startup at 0.9 V min. (I
OUT
= 1 mA) guaranteed
• Low current consumption : During operation 23.2
μ
A (V
OUT
= 3.3 V, typ.)
During shutdown 0.5
μ
A (max.)
• Duty ratio : 50 % / 75 % built-in auto-switching-type PFM control circuit (A, B, and D type)
75 % built-in fixed-type PFM control circuit (C type)
• External parts : Coil, capacitor, and diode
• Output voltage : Selectable in 0.1 V steps between 2.0 V to 6.5 V (A, B, and C type)
Selectable in 0.1 V steps between 1.5 V to 6.5 V (D type)
• Output voltage accuracy :
±2.4%
• Shutdown function (A type)
• V
DD
/ V
OUT
separate type (D type)
• External transistor type available (S-8352 Series)
• Lead-free, Sn 100%, halogen-free
*1
*1.
Refer to “
Product Name Structure”
for details.
Applications
• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs
• Power supplies for audio equipment such as portable CD / MD players
• Constant voltage power supplies for cameras, video equipment, and communications equipment
• Power supplies for microcomputers
Packages
• SOT-23-3
• SOT-23-5
• SOT-89-3
Seiko Instruments Inc.
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