AS1335 Ver la hoja de datos (PDF) - austriamicrosystems AG
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AS1335 Datasheet PDF : 19 Pages
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Datasheet
AS1335
1.5A, 1.5MHz, Synchronous DC/DC Step-Down Converter
1 General Description
2 Key Features
The AS1335 is a high-efficiency, constant-frequency
synchronous buck converter available in a fixed or an
adjustable output voltage version. The wide input volt-
age range (2.6V to 5.25V), the high output current (up to
lid 1.5A) and minimal external component requirements
make the AS1335 perfect for any single Li-Ion battery-
powered application.
a Typical supply current with no load is 400µA and
decreases to ≤1µA in shutdown mode. The highly effi-
v cient duty cycle (100%) provides low dropout operation,
prolonging battery life in portable systems.
ill The device also offers a power-ok signal with a 215ms
delay, which can be reseted or delayed further via the
RSI pin.
t An internal synchronous switch increases efficiency and
G s eliminates the need for an external Schottky diode. The
internally fixed switching frequency (1.5MHz) allows for
the use of small surface mount external components.
A t The AS1335 is available in a 10-pin TDFN 3x3mm pack-
s n age.
! High Efficiency: Up to 96%
! Output Current: 1.5A
! Input Voltage Range: 2.6V to 5.25V
! Output Voltage Range: 0.6V to VIN
! Constant Frequency Operation: 1.5MHz
! No Schottky Diode Required
! Power OK with 215ms delay
! Low Dropout Operation: 100% Duty Cycle
! Low Quiescent Supply Current: 400µA
! Shutdown Mode Supply Current: ≤1µA
! Current Mode Operation for Excellent Line/Load
Transient Response
! Thermal Protection
! 10-pin TDFN 3x3mm Package
aaml co3nAptpelications Figure 1. AS1335 - Typical Application Diagram
The device is ideal for mobile communication devices,
laptops and PDAs, ultra-low-power systems, threshold
detectors/discriminators, telemetry and remote systems,
medical instruments, or any other space-limited applica-
tion with low power-consumption requirements.
nic VIN
Tech 2.6V to 5.25V
CIN
22µF
VIN
NC
EN
POK
AS1335
2.2µH
SW
PGND
GND
FB
COUT
22µF
VOUT
1.0V, 1.5A
GND
RSI
www.austriamicrosystems.com/DC-DC_Step-Down/AS1335
Revision 1.03
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