S-8365 Datasheet, PDF (1/63 Pages) Seiko Instruments Inc – STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

Rev.1.1_00
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or
PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8365/8366 Series
„ Features
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, 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.
• 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
• Small packages
• Lead-free product
: 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
: SNT-6A, SOT-23-5, SOT-23-6
„ Applications
• MP3 players, digital audio players
• Digital cameras, GPS, wireless transceiver
• Portable devices
„ Packages
Package name
SNT-6A
SOT-23-5
SOT-23-6
Package
PG006-A
MP005-A
MP006-A
Drawing code
Tape
Reel
PG006-A
PG006-A
MP005-A
MP005-A
MP006-A
MP006-A
Land
PG006-A
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Seiko Instruments Inc.
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