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Part: S-8351CxxUA
Category:
Power Management
-> Regulators
-> Switching Regulators
Description: Control Method = PFM ;; Operation Start Voltage = 0.9 V ;; Output Voltage = 2.0-6.5V (A, B, C) 1.5-6V (D) ;; Output Accuracy = ±2.4% ;; Switching Frequency = 100 KHZ ;; Current Consumption Operating = 23.2 µA (3.3V) ;; Current Consumption Shutdown = 0.5 µA Max. ;; Efficiency Typ. = 85% ;; Package = SOT-23-5 SOT-23-3 SOT-89-3
Company: Seiko Instruments
Datasheet: Download S-8351CxxUA datasheet File size : 4 kB
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Datasheet text preview:
Rev.1.0_10
SMALL PACKAGE PFM CONTROL STEP-UP SWITCHING REGULATOR
S-8351/52 Series
The S-8351/8352 Series is a CMOS PFM-control step-up switching regulator that mainly consists of a reference voltage source, an oscillator, and a comparator. The PFM controller allows the duty ratio to be automatically switched according to the load (light load: 50%, high output current: 75%), enabling products with a low ripple over a wide range, high efficiency, and high output current (product types A, B, and D). Products with a fixed duty ratio of 75% are also available (product type C). W ith the S-8351 Series, a step-up switching regulator can be configured by using an external coil, capacitor, and diode. The built-in MOS FET is turned off by a protection circuit when the voltage at the CONT pin exceeds the limit to prevent it from being damaged. This feature, along with the mini 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
Startup at 0.9 V min. (IOUT = 1 mA) guaranteed During maximum operation: 23.2 µA (VOUT = 3.3 V, typ.) During shutdown: 0.5 µA (max.) · Duty ratio: 50/75%, built-in auto-switching-type PFM controller (product types A, B, D) 75%, built-in fixed-type PFM controller (product type C) · External parts: Coil, capacitor, diode · Output voltage: Settable to between 2.0 to 6.5 V (product types A, B, C) or 1.5 to 6.5 V (product type D) in 0.1 V steps, accuracy of ±2.4% · Shutdown function (product type A) · VDD/VOUT separate type (product type D) · External transistor type available (S-8352 Series) · Low voltage operation: · Low input current:
Packages
· SOT-23-3 (package drawing code: MP003-A) · SOT-23-5 (package drawing code: MP005-A) · SOT-89-3 (package drawing code: UP003-A)
Applications
· Power supply for portable equipment such as digital cameras, electronic notebooks, and PDAs · Power supply for audio equipment such as portable CD/MD players · Constant voltage power supply for cameras, video equipment, and communications equipment · Power supply for microcomputers
Seiko Instruments Inc.
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SMALL PACKAGE PFM CONTROL STEP-UP SWITCHING REGULATOR
S-8351/52 Series
Rev.1.0_10
Applications
1. Function List
Control System Switching Product Name (Duty Ratio (%)) Frequency (kHz) S-8351AxxMC S-8351BxxMA S-8351CxxMA S-8351CxxUA S-8351DxxMC S-8352AxxMC S-8352BxxMA S-8352CxxMA S-8352CxxUA S-8352DxxMC PFM (50/75) PFM (50/75) PFM (75) PFM (75) PFM (50/75) PFM (50/75) PFM (50/75) PFM (75) PFM (75) PFM (50/75) 100 100 100 100 100 100 100 100 100 100 Shutdown Function Yes Yes VDD/VOUT Separate Type Yes Yes Power MOS FET Built-in Built-in Built-in Built-in Built-in External External External External External Package SOT-23-5 SOT-23-3 SOT-23-3 SOT-89-3 SOT-23-5 SOT-23-5 SOT-23-3 SOT-23-3 SOT-89-3 SOT-23-5 Application Application requiring shutdown function Application not requiring shutdown function Application not requiring shutdown function Application not requiring shutdown function Application in which output voltage is adjusted by external resistance Application requiring shutdown function Application not requiring shutdown function Application not requiring shutdown function Application not requiring shutdown function Application in which output voltage is adjusted by external resistance
2. Product Name S-835 X X XX XX - XXX - T2 IC direction in tape specification Product name Package name MA; SOT-23-3 (without shutdown function) MC; SOT-23-5 (with shutdown function or VDD /VOUT separate type) UA; SOT-89-3 (without shutdown function) Output voltage × 10 (15 for output voltage value 1.5) Product type A ; With shutdown function B ; Automatic duty ratio switching type C ; Duty ratio fixed type (75%) D ; VDD /VOUT separate type Series name 1; Built-in power MOS FET 2; External power MOS FET
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Seiko Instruments Inc.
SMALL PACKAGE PFM CONTROL STEP-UP SWITCHING REGULATOR
Rev.1.0_10
3. Product Name List Output Voltage S-8351AxxMC Series 3.0 3.3 3.5 5.0 5.5
S-8351A30MC-J2P-T2 S-8351A33MC-J2S-T2 S-8351A35MC-J2U-T2 S-8351A50MC-J3J-T2 S-8351A55MC-J3O-T2
S-8351/52 Series
S-8351BxxMA Series
S-8351B30MA-J4P-T2
S-8351CxxMA S-8351CxxUA Series
S-8351DxxMC Series
Output Voltage
S-8352AxxMC Series
S-8352BxxMA Series
S-8352CxxMA S-8352CxxUA Series
S-8352DxxMC Series
S-8352D20MC-K8F-T2
2.0 3.0 5.0
Remark above.
S-8352A30MC-K2P-T2 S-8352B30MA-K4P-T2 S-8352A50MC-K3J-T2
Please consult our sales staff if you require a product with an output voltage other than those specified
Seiko Instruments Inc.
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Others parts begin by s0
S0-1 S0-2 S0-3 S0-4 S0-5 S0-6 S0-7 S0-8 S0-9 S0-10 S0-11 S0-12 S0-13 S0-14 S0-15 S0-16 S0-17 S0-18 S0-19 S0-20 S0-21 S0-22 S0-23
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