Datasheet AS13985 Micropower 150mA Low-Noise LDO 1 General Description 2 Key Features Ultra-Low Dropout Voltage (typically The AS13985 is a high-performance low-dropout 150mA 45mV 150mA, 0.3mV 1mA) voltage regulator designed for use with very-low ESR out- put capacitors. The device can deliver superior perfor- Supply Range: 2.5V to 5.5V mance in all specifications critical to battery-powered designs, and is perfectly suited for mobile phones, PDAs, Output Voltage Range: 1.2V to 5.0V (in 25mV Steps) MP3 players, and other battery powered devices. Output Current: 150mA (Guaranteed) Stability is guaranteed with a ceramic output capacitor from Stable with Low-ESR Output Capacitor 1 to 22F. The low equivalent series resistance of these capacitors ensures low output impedance at high frequen- Integrated Over-Temperature/Over-Current Protection cies. Low GND Pin Current (only 95A) Automatic sleep mode requires less than 1A quiescent current when pin EN is pulled low. Output Voltage Accuracy: 1% Regulation performance is excellent even under low drop- Minimal External Components Required out conditions, when the power transistor has to operate in linear mode. High Peak-Current Capability A 10nF bypass capacitor can be added to reduce output Low Shutdown Current: 1A noise to 30V. The low-noise performance allows direct connection of noise sensitive circuits without additional fil- Operating Temperature Junction Range: -40 to +125C tering networks. Smallest Available Packages: Multiple output voltage options are available as standard - 5-bump WLP products. Contact austriamicrosystems AG for details. -5-pin SOT23 The AS13985 is available in a 5-bump WLP package and a 5-pin SOT23 package. 3 Applications The AS13985 is ideal for powering cordless and mobile phones, MP3 players, CD and DVD players, PDAs, hand- held computers, digital cameras, and any other hand-held battery-powered device. Figure 1. AS13985 - Block Diagram VIN EN VREF + VOUT Over-Current/ Over-Temperature BYPASS Protection GND AS13985 www.austriamicrosystems.com Revision 1.13 1 - 12AS13985 Datasheet - Pinout 4 Pinout 4.1 Pin Assignments Figure 2. Pin Assignments (Top View) VIN VOUT 1 5 54 2 AS13985 GND 2 (SOT23) 1 3 AS13985 BYPASS 3 4 EN (WLP Top Through View) 4.2 Pin Descriptions Table 1. Pin Descriptions Name WLP SOT23 Description Input Voltage VIN 4 1 Ground GND 2 2 Low-Noise Operation Bypass Capacitor BYPASS 5 3 Logic-High Enable Input. EN 1 4 VEN 1.2V: VOUT is enabled. VEN 0.4V: VOUT is disabled. Regulated Output Voltage VOUT 3 5 www.austriamicrosystems.com Revision 1.13 2 - 12