參數(shù)資料
型號(hào): AP1605TSA
元件分類(lèi): 基準(zhǔn)電壓源/電流源
英文描述: RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述: 抗輻射高效,5安培開(kāi)關(guān)穩(wěn)壓器
文件頁(yè)數(shù): 1/6頁(yè)
文件大?。?/td> 170K
代理商: AP1605TSA
AP1605
PWM/PFM Dual-mode Step-Down Switching Regulator
Features
- Low current consumption:
In operation: 100μA max.
Power off: 2μA max.
- Input voltage: 2.5V to 7V.
Adjustable version (+2.5%)
- PWM/PFM dual Mode
- Oscillation frequency: 300KHz (Typ.)
- With a power-off function.
- Built-in internal SW P-channel MOS
- SOP-8L/TSSOP-8L Package.
Applications
- On-board power supplies of battery devices for
portable telephones, electronic notebooks, PDA,
and other hand-held sets.
- Power supplies for audio equipment, including
portable CD players and headphone stereo
equipment.
- Fixed voltage power supply for cameras, video
equipment and communications equipment.
- Power supplies for microcomputers.
- Conversion from four Ni-H or Ni-Cd cells or two
lithium-ion cells to 3.3V/3V.
- Conversion of AC adapter input to 5V/3V.
Pin Assignments
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 1.1 Jan 18, 2005
1/6
General Description
AP1605 consists of CMOS step-down switching
regulator with PWM/PFM dual mode control. These
devices include a reference voltage source, oscillation
circuit, error amplifier, internal PMOS and etc.
AP1605 provides low-ripple power, high efficiency,
and
excellent
transient
PWM/PFM control circuit is able to very the duty ratio
linearly 0%~0.25% (PFM) and 25%~100% (PWM).
With the addition of an internal P-channel Power MOS,
a coil, capacitors, and a diode connected externally,
these ICs can function as step-down switching
regulators. They serve as ideal power supply units for
portable devices when coupled with the SOP–8L
mini-package, providing such outstanding features as
low current consumption. Since this converter can
accommodate an input voltage of up to 7V, it is also
ideal when operating via an AC adapter.
characteristics.
The
1
2
3
4
8
7
6
5
FB
SW
Vcc
AP1605
SW
Vss
Vss
PVcc
CE
SOP-8L
1
3
2
4
8
6
7
5
Vss
CE
CE
FB
SW
PVcc
PVcc
Vcc
AP1605
TSSOP-8L
Pin Descriptions
Pin No.
Pin
Name SOP TSSOP
FB
1
Description
4
Feedback pin
Chip Enable:
H: Enable
L: Disable
IC signal power supply pin,
add a 10
resistor to PVcc
and a 0.1μF capacitor to
GND.
IC power supply pin
Switch Pin. Connect external
inductor/diode here.
Minimize trace area at this
pin to reduce EMI.
GND Pin
CE
2
2
、
3
Vcc
3
5
PVcc
4
6
7
SW
5
、
6
8
Vss
7
、
8
1
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