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AS1334 Datasheet(PDF) 1 Page - ams AG |
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AS1334 Datasheet(HTML) 1 Page - ams AG |
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1 / 17 page  AS1334 650mA, Ultra low Ripple Step Down DC/DC Converter www.austriamicrosystems.com Revision 1.04 1 - 17 Datasheet 1 General Description The AS1334 is a step-down DC-DC converter designed to power portable applications from a single Li-Ion battery. The device also achieves high-performance in mobile phones and other applications requiring low dropout voltage. The AS1334 operates from an input voltage range of 2.7 to 5.5V while providing output voltages of 1.2, 1.5, 1.8, 2.5, 3.0 and 3.3V. Fixed-frequency PWM operation minimizes RF interference. Shutdown function turns the device off and reduces battery consumption to 0.01µA (typ.). The AS1334 is available in a TDFN(3x3) 8-pin package. A high switching frequency (2 MHz) allows use of tiny surface-mount components. Only three small external surface-mount components, an inductor and two ceramic capacitors are required. 2 Key Features ! Output Voltage Ripple: 2mV ! PWM Switching Frequency: 2MHz ! Single Lithium-Ion Cell Operation ! Output Voltage Range: 1.2V to 3.4V (available in 100mV steps, see Ordering Information on page 16) ! Fixed Output Voltages: - 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V ! Maximum Load Capability of 650mA ! 97% High Efficiency, 94% Average Efficiency ! Current Overload Protection ! Thermal Overload Protection ! Power-OK ! Soft Start ! Low Dropout Voltage (140 m Ω Typ PFET) ! TDFN(3x3) 8-pin 3 Applications The AS1334 is an ideal solution to supply noise sensitive applications as cellular phones, hand-held radios, RF PC cards, battery powered RF devices, RFID chipsets, A/D Converter, Sensors and OpAmps. Figure 1. AS1334 - Typical Application Circuit AS1334 PGND SGND EN PVIN VDD SW FB 10 µF 3.3 µH VOUT VIN 10 µF ON OFF POK |
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