Maker : Advanced Analogic Technologies
Part No. : APS1056

Datasheet PDF : APS1056.pdf
Cross Reference : APS1056 Cross Reference
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Product Information

APS1056 Fast Transient 600mA Step-Down Converter General Description The APS1056 SwitchReg is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product family. It is a 1.4MHz stepdown converter with an input voltage range of 2.7V to 5.5V and output voltage as low as 0.6V. It is optimized to react quickly to a load variation. The APS1056 is available in fixed voltage versions with internal feedback and a programmable version with external feedback resistors. It can deliver 600mA of load current while maintaining a low 27µA no load quiescent current. The 1.4MHz switching frequency minimizes the size of external components while keeping switching losses low. The APS1056 is designed to maintain high efficiency throughout the operating range, which is critical for portable applications. The APS1056 is available in a Pb-free SOT23-5 package and is rated over the -40°C to +85°C temperature range. Features • • • • • • • • • • • • • • SwitchReg™ VIN Range: 2.7V to 5.5V VOUT Fixed or Adjustable from 0.6V to VIN 27µA No Load Quiescent Current Up to 98% Efficiency 600mA Max Output Current 1.4MHz Switching Frequency 120µs Soft Start Fast Load Transient Over-Temperature Protection Current Limit Protection 100% Duty Cycle Low-Dropout Operation <1µA Shutdown Current SOT23-5 Package Temperature Range: -40°C to +85°C Preliminary Information Applications • • • • • • Cellular Phones Digital Cameras Handheld Instruments Microprocessor / DSP Core / IO Power PDAs and Handheld Computers USB Devices www.DataSheet4U.com Typical Application (Fixed Output Voltage) VIN VO U1 APS1056 L1 LX 4.7µH VIN C2 4.7µF EN GND OUT C1 4.7µF APS1056.2007.04.0.9 (PRELIMINARY INFORMATION) 1 APS1056 Fast Transient 600mA Step-Down Converter Pin Descriptions Pin # 1 2 3 4 5 Symbol VIN GND EN OUT LX Function Input supply voltage for the converter. Ground pin. Connect to the output and input capacitor return. Enable pin. Feedback input pin. This pin is connected either directly to the converter output or to an external resistive divider for an adjustable output. Switching node. Connect the inductor to this pin. It is internally connected to the drain of both high- and low-side MOSFETs. Pin Configuration SOT23-5 (Top View) VIN GND EN 1 5 LX 2 3 4 OUT www.DataSheet4U.com 2 (PRELIMINARY INFORMATION) APS1056.2007.04.0.9 APS1056 Fast Transient 600mA Step-Down Converter Absolute Maximum Ratings1 Symbol VIN VLX VOUT VEN TJ TLEAD Description Input Voltage GND LX to GND OUT to GND EN to GND Operating Junction Temperature Range Maximum Soldering Temperature (at leads, 10 sec) Value 6.0 -0.3 to VIN + 0.3 -0.3 to VIN + 0.3 -0.3 to 6.0 -40 to 150 300 Units V V V V °C °C Thermal Information Symbol PD θJA Description Maximum Power Dissipation Thermal Resistance2 2, 3 Value 667 150 Units mW °C/W www.DataSheet4U.com 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted on an FR4 board. 3. Derate 6.67mW/°C above 25°C. APS1056.2007.04.0.9 (PRELIMINARY INFORMATION) 3 APS1056 Fast Transient 600mA Step-Down Converter Electrical Characteristics1 TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C, VIN = 3.6V. Symbol Description Conditions Min 2.7 VIN Rising Hysteresis VIN Falling IOUT = 0 to 600mA, VIN = 2.7V to 5.5V No Load, 0.6V Adjustable Version EN = AGND = PGND 600 0.45 0.40 VIN = 5.5V, VLX = 0 to VIN, EN = GND VIN = 2.7V to 5.5V 0.6V Output, No Load TA = 25°C 0.6V Output >0.6V Output From Enable to Output Regulation TA = 25°C 1 0.1 591 600 609 0.2 250 150 1.0 1.4 140 15 2.0 100 1.8 -3.5 0.6 27 +3.5 VIN 70 1.0 Typ Max 5.5 2.7 Units V V mV V % V µA µA mA Ω Ω µA %/V mV µA kΩ µs MHz °C °C V V µA Step-Down Converter VIN I...

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