S-8365AAABA-M5T1Y2 Datasheet, PDF (1/63 Pages) Seiko Instruments Inc – PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

S-8365/8366 Series
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or
www.sii-ic.com
PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
© SII Semiconductor Corporation, 2009-2015
Rev.2.1_01
The S-8365/8366 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage
source, an oscillation circuit, an error amplifier, a phase compensation circuit, a timer latch short-circuit protection circuit, a
PWM control circuit (S-8365 Series) and a PWM / PFM switching control circuit (S-8366 Series).
With an external low-ON-resistance Nch Power MOS FET, this product is ideal for applications requiring high efficiency
and a high output current.
The S-8365 Series efficiently works on voltage’s condition of large I/O difference due to the PWM control circuit linearly
varies the duty ratio to 90%.
During light-load, the S-8366 Series switches its operation to the PFM control by the PWM / PFM switching control circuit
in order to prevent efficiency decline due to the IC operating current.
Ceramic capacitors can be used for output capacitor. Small packages SNT-6A, SOT-23-5 and SOT-23-6 enable
high-density mounting.
 Features
• Low operation voltage
• Input voltage range
• Oscillation frequency
• Reference voltage
• Soft start function
• Low current consumption
• Duty ratio
• Shutdown function
• External parts
• Timer latch short-circuit protection circuit
• UVLO (under-voltage lockout) function
• Lead-free, Sn 100%, halogen-free^*1
: Start at 1.1 V (1 mA) guaranteed (in the product without UVLO function)
: 1.8 V to 5.5 V
: 1.2 MHz, 600 kHz
: 0.6 V±2.0%
: 7 ms typ.
: 70 μA typ. at switching off
: Built-in PWM / PFM switching control circuit (S-8366 Series)
28% to 85% (1.2 MHz product)
28% to 90% (600 kHz product)
: Current consumption 1.0 μA max. at shutdown
: Inductor, diode, capacitor, transistor
: Selectable with / without short-circuit protection circuit for each product
Settable delay time by external capacitor
(in the product with short-circuit protection)
: Selectable with / without UVLO for each product
*1. Refer to “ Product Name Structure” for details.
 Applications
• MP3 players, digital audio players
• Digital cameras, GPS, wireless transceiver
• Portable devices
 Packages
• SNT-6A
• SOT-23-5
• SOT-23-6
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