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S8354 PDF даташит

Спецификация S8354 изготовлена ​​​​«Seiko Instruments» и имеет функцию, называемую «(S8353 / S8354) PWM Control Switchable Built-in Transistor Switching Regulator».

Детали детали

Номер произв S8354
Описание (S8353 / S8354) PWM Control Switchable Built-in Transistor Switching Regulator
Производители Seiko Instruments
логотип Seiko Instruments логотип 

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S8354 Даташит, Описание, Даташиты
www.DataSheet4U.com
Rev.1.4_00
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE
BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series
The S-8353/8354 Series is a CMOS step-up switching regulator which
mainly consists of a reference voltage source, an oscillation circuit, a
power MOS FET, an error amplifier, a phase compensation circuit, a PWM
control circuit (S-8353 Series) and a PWM / PFM switching control circuit
(S-8354 Series).
The S-8353/8354 Series can configure the step-up switching regulator with
an external coil, capacitor, and diode. In addition to the above features,
the small package and low current consumption make the S-8353/8354
Series ideal for portable equipment applications requiring high efficiency.
The S-8353 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 models),
an excellently designed error amplifier, and phase compensation circuits.
The S-8354 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 18.7 µA (3.3 V, 50 kHz, typ.)
During shutdown: 0.5 µA (max.)
• Duty ratio : Built-in PWM / PFM switching control circuit (S-8354 Series)
15 % to 83 % (30 kHz and 50 kHz models)
15 % to 78 % (250 kHz models)
• External parts : Coil, capacitor, and diode
• 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 : 30 kHz, 50 kHz, and 250 kHz selectable
• Soft start function : 6 ms (50 kHz, typ.)
„ 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 communication devices
• Power supplies for microcomputers
„ Packages
Package Name
SOT-23-3
SOT-23-5
SOT-89-3
Package
MP003-A
MP005-A
UP003-A
Drawing Code
Tape
MP003-A
MP005-A
UP003-A
Reel
MP003-A
MP005-A
UP003-A
Seiko Instruments Inc.
1









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S8354 Даташит, Описание, Даташиты
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STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series
Rev.1.4_00
„ Block Diagrams
(1) A, C and H Types (Without Shutdown Function)
CONT
VOUT
Oscillation circuit
PWMcontrol circuit
or PWM / PFM
swiching control
circuit
IC internal
power supply
+
Soft start built-in
reference power
supply
Phase
compensation
circuit
VSS
(2) A and H Types (With Shutdown Function)
CONT
Figure 1
VOUT
Oscillation circuit
PWMcontrol circuit
or PWM / PFM
swiching control
circuit
IC internal
power supply
+
Soft start built-in
reference power
supply
Phase
compensation
circuit
VSS
ON / OFF
Figure 2
(3) D and J Types (VDD / VOUT Separate Type)
CONT
VDD
VOUT
Oscillation circuit
PWMcontrol circuit
or PWM / PFM
swiching control
circuit
IC internal
power supply
+
Soft start built-in
reference power
supply
Phase
compensation
circuit
VSS
Figure 3
2 Seiko Instruments Inc.









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S8354 Даташит, Описание, Даташиты
www.DataSheet4U.com
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.1.4_00
S-8353/8354 Series
„ Product Name Structure
The control system, product types, output voltage, and packages for the S-8353/8354 Series can be selected at the
user’s request. Please refer to the “3. Product Name” for the definition of the product name and “4. Product Name
List” for the full product names.
1. Function List
(1) PWM Control Products
Product Name
S-8353AxxMC
S-8353AxxMA
S-8353AxxUA
S-8353CxxMA
S-8353DxxMC
Switching
Frequency
kHz
50
50
50
30
50
Shutdown
Function
Yes
Table 1
VDD / VOUT
Separate
Type
Yes
Package
SOT-23-5
SOT-23-3
SOT-89-3
SOT-23-3
SOT-23-5
S-8353HxxMC
250
Yes SOT-23-5
S-8353HxxMA
250
SOT-23-3
S-8353HxxUA
250
SOT-89-3
S-8353JxxMC
250
Yes SOT-23-5
Application
Applications requiring shutdown function
Applications not requiring shutdown function
Applications not requiring shutdown function
For pager
Applications requiring variable output voltage
with an external resistor
Applications requiring a shutdown function
and a thin coil
Applications not requiring a shutdown function
and requiring a thin coil
Applications not requiring a shutdown function
and requiring a thin coil
Applications requiring variable output voltage
with an external resistor and a thin coil
(2) PWM / PFM Switching Control Products
Table 2
Product Name
S-8354AxxMC
S-8354AxxMA
S-8354AxxUA
S-8354CxxMA
S-8354DxxMC
Switching
Frequency
kHz
50
50
50
30
50
Shutdown
Function
Yes
VDD / VOUT
Separate
Type
Yes
Package
SOT-23-5
SOT-23-3
SOT-89-3
SOT-23-3
SOT-23-5
S-8354HxxMC
250
Yes SOT-23-5
S-8354HxxMA
250
SOT-23-3
S-8354HxxUA
250
SOT-89-3
S-8354JxxMC
250
Yes SOT-23-5
Application
Applications requiring shutdown function
Applications not requiring shutdown function
Applications not requiring shutdown function
For pager
Applications requiring variable output voltage
with an external resistor
Applications requiring a shutdown function
and a thin coil
Applications not requiring a shutdown function
and requiring a thin coil
Applications not requiring a shutdown function
and requiring a thin coil
Applications requiring variable output voltage
with an external resistor and a thin coil
Seiko Instruments Inc.
3










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