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AP1605SLA Datasheet(PDF) 1 Page - Anachip Corp |
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AP1605SLA Datasheet(HTML) 1 Page - Anachip Corp |
1 / 6 page AP1605 PWM/PFM Dual-mode Step-Down Switching Regulator 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 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. 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 characteristics. The 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. Pin Assignments 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 Description FB 1 4 Feedback pin CE 2 2、3 Chip Enable: H: Enable L: Disable Vcc 3 5 IC signal power supply pin, add a 10Ω resistor to PVcc and a 0.1µF capacitor to GND. PVcc 4 6、7 IC power supply pin SW 5、6 8 Switch Pin. Connect external inductor/diode here. Minimize trace area at this pin to reduce EMI. Vss 7、8 1 GND Pin |
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