http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




Seiko Instruments Electronic Components Datasheet

S-8356 Datasheet

PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

No Preview Available !

S-8356 pdf
S-8355/56/57/58 Series
STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or
www.sii-ic.com
PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
© SII Semiconductor Corporation, 2002-2015
Rev.8.1_01
The S-8355/56/57/58 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 PWM control circuit (S-8355/57 Series) and
a PWM/PFM switching control circuit (S-8356/58 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-8355/57 Series realizes low ripple, high efficiency, and excellent transient characteristics due to its PWM control
circuit whose duty ratio can be varied linearly from 0 to 83% (from 0 to 78% for 250 kHz, 300 kHz, and 600 kHz models), an
excellently designed error amplifier and a phase compensation circuits.
S-8356/58 Series features a PWM/PFM switching controller that can switch the operation to a PFM controller with a duty
ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current.
Features
• Low voltage operation : Startup at 0.9 V min. (IOUT = 1 mA) guaranteed
• Low current consumption : During operation 25.9 μA (3.3 V, 100 kHz, typ.)
During shutdown 0.5 μA (max.)
• Duty ratio : Built-in PWM/PFM switching control circuit (S-8356/58 Series)
15 to 83% (100 kHz models)
15 to 78% (250 kHz, 300 kHz, and 600 kHz models)
• External parts : Coil, diode, capacitor, and transistor
• Output voltage : Selectable in 0.1 V steps between 1.5 and 6.5 V (for VDD / VOUT separate types)
Selectable in 0.1 V steps between 2.0 and 6.5 V (for other than VDD / VOUT separate types)
• Output voltage accuracy : ±2.4%
• Oscillation frequency : 100 kHz, 250 kHz, 300 kHz, 600 kHz selectable
• Soft start function : 6 ms (100 kHz, typ.)
• Shutdown function
• 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, VCRs, and communications devices
• Power supplies for microcomputers
Packages
• SOT-23-3
• SOT-23-5
• SOT-89-3
1


Seiko Instruments Electronic Components Datasheet

S-8356 Datasheet

PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

No Preview Available !

S-8356 pdf
STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8355/56/57/58 Series
Rev.8.1_01
Block Diagrams
(1) S-8357/58 Series B, H and F Types
(Without Shutdown Function)
(2) S-8357/58 Series B, H, F and N Types
(With Shutdown Function)
VOUT
VOUT
EXT
Oscillation circuit IC internal
power supply
PWMcontrol circuit or
PWM / PFM switching
control circuit
+
Soft start built-in
reference power
supply
Phase
compensation
circuit
EXT
VSS
Oscillation circuit
PWMcontrol circuit or
PWM / PFM switching
control circuit
IC internal
power
supply
+
Soft start built-in
reference power
supply
Phase
compensation
circuit
VSS
Figure 1
ON / OFF
Figure 2
(3) S-8357/58 Series E, J, G and P Types
(VDD / VOUT Separate Type)
VDD
VOUT
Oscillation circuit
IC internal
power
supply
EXT
PWMcontrol circuit or
PWM / PFM switching
control circuit
+
Soft start built-in
reference power
supply
Phase
compensation
circuit
(4) S-8355/56 Series K, L, M and Q Types
(With Shutdown Function, VDD / VOUT Separate Type)
VDD
VOUT
Oscillation circuit
IC internal
power
supply
EXT
PWMcontrol circuit or
PWM / PFM switching
control circuit
+
VSS
Soft start built-in
reference power
supply
Phase
compensation
circuit
VSS
Figure 3
ON / OFF
Figure 4
2


Part Number S-8356
Description PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Maker Seiko Instruments
Total Page 30 Pages
PDF Download
S-8356 pdf
Download PDF File
[partsNo] view html
View PDF for Mobile






Related Datasheet

1 S-8351 (S-8351 / S-8352) SMALL PACKAGE PFM CONTROL STEP-UP SWITCHING REGULATOR Seiko Instruments
Seiko Instruments
S-8351 pdf
2 S-8352 (S-8351 / S-8352) SMALL PACKAGE PFM CONTROL STEP-UP SWITCHING REGULATOR Seiko Instruments
Seiko Instruments
S-8352 pdf
3 S-8353 (S-8353 / S-8354) PWM Control Switchable Built-in Transistor Switching Regulator Seiko Instruments
Seiko Instruments
S-8353 pdf
4 S-8354 (S-8353 / S-8354) PWM Control Switchable Built-in Transistor Switching Regulator Seiko Instruments
Seiko Instruments
S-8354 pdf
5 S-8355 PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Seiko Instruments
Seiko Instruments
S-8355 pdf
6 S-8356 PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Seiko Instruments
Seiko Instruments
S-8356 pdf
7 S-8357 PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Seiko Instruments
Seiko Instruments
S-8357 pdf
8 S-8358 PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Seiko Instruments
Seiko Instruments
S-8358 pdf






Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components