CONTROLLER. S-8365 Datasheet

S-8365 Datasheet PDF

Part S-8365
Description SWITCHING REGULATOR CONTROLLER
Feature S-8365/8366 Series www.ablicinc.com © ABLIC Inc., 2009-2015 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz .
Manufacture ABLIC
Datasheet
Download S-8365 Datasheet

S-8365/8366 Series STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PW S-8365 Datasheet
S-8365/8366 Series www.ablicinc.com © ABLIC Inc., 2009-2015 S-8365 Datasheet




S-8365
S-8365/8366 Series
www.ablicinc.com
© ABLIC Inc., 2009-2015
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or
PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.2.1_02
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 V2.0%
: 7 ms typ.
: 70 A 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 A 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
1



S-8365
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8365/8366 Series
Rev.2.1_02
Block Diagram
1. With UVLO function and short-circuit protection
L SD VOUT
VDD
M1
EXT
VIN CIN
ON/OFF
UVLO
Triangular Wave
Oscillation Circuit
PWM Comparator
PWM control, or
PWM / PFM
Switching Control
Circuit
Error
Amplifier
Timer Latch
Short-Circuit
Protection
ON/OFF
Circuit
Reference Voltage
with Soft-Start Circuit
CFB
FB
CSP
VSS
Figure 1
2. With UVLO function, without short-circuit protection
L SD
RFB1
RFB2
COUT
VOUT
VDD
M1
EXT
VIN CIN
ON/OFF
UVLO
Triangular Wave
Oscillation Circuit
PWM Comparator
PWM control, or
PWM / PFM
Switching Control
Circuit
Error
Amplifier
CFB
FB
ON/OFF
Circuit
Reference Voltage
with Soft-Start Circuit
Figure 2
VSS
RFB1
RFB2
COUT
2




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