AS1334-BTDT-15 Ver la hoja de datos (PDF) - austriamicrosystems AG
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AS1334-BTDT-15 Datasheet PDF : 19 Pages
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Datasheet
AS1334
650mA, Ultra low Ripple Step Down DC/DC Converter
1 General Description
2 Key Features
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.
lid 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.
a Shutdown function turns the device off and reduces battery
consumption to 0.01µA (typ).
v The AS1334 is available in a TDFN(3x3) 8-pin package. A high
ill switching frequency (2 MHz) allows use of tiny surface-mount
components. Only three small external surface-mount components,
AG t st an inductor and two ceramic capacitors are required.
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 17)
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 mΩ Typ PFET)
TDFN(3x3) 8-pin
ams 3 nApptliecatinons Figure 1. AS1334 - Typical Application Circuit
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.
al co VIN
ic 10 µF
PVIN
VDD
hn ON
EN
Tec OFF
AS1334
SW 3.3 µH
FB
10 µF
POK
VOUT
PGND
SGND
www.austriamicrosystems.com/DC-DC_Step-Down/AS1334
Revision 1.09
1 - 18
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