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AS1325 PDF даташит

Спецификация AS1325 изготовлена ​​​​«austriamicrosystems» и имеет функцию, называемую «Step-Up DC-DC Converter».

Детали детали

Номер произв AS1325
Описание Step-Up DC-DC Converter
Производители austriamicrosystems
логотип austriamicrosystems логотип 

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AS1325 Даташит, Описание, Даташиты
AS1325
300mA Step-Up DC-DC Converter
Data Sheet
1 General Description
The AS1325 is a high-efficiency step-up DC-DC con-
verter designed to generate a fixed output voltage of
+3.3V or +5V.
The AS1325 achieves an efficiency of up to 96% and the
minimum input voltage is 1.5V. The AS1325-BSTT-33
delivers up to 300mA output current at the fixed output
voltage of +3.3V (@ 2V VBATT). With the fixed output
voltage of +5V the AS1325-BSST-50 supplies up to
185mA output current (@ 2V VBATT).
In order to save power the AS1325 features a shutdown
mode, where it draws less than 1µA. In shutdown mode
the battery is connected directly to the output enabling
the supply of real-time-clocks.
The AS1325 provides a power-on reset output that goes
high-impedance when the output reaches 90% of its reg-
ulation point.
The SHDNN trip threshold of the AS1325 can be used
as an input voltage detector that disables the device
when the battery voltage falls to a predetermined level.
An internal synchronous rectifier is included.
The AS1325 is available in a 6-pin SOT23 package.
Figure 1. Application Diagram
2 Key Features
! Fixed Output Voltage:
- 3.3V (AS1325-BSTT-33) or 5V (AS1325-BSST-50)
! Output Current:
- Up to 300mA (AS1325-BSTT-33) @ 2V VBATT
- Up to 185mA (AS1325-BSST-50) @ 2V VBATT
! Internal Synchronous Rectifier
! Shutdown Mode Supply Current: Less Than 1µA
! Efficiency: Up to 96%
! Minimum Input Voltage: +1.5V
! Accurate Shutdown Low-Battery Cutoff Threshold
! Battery Input Connected to Pin OUT in Shutdown
Mode for Backup Power
! Antiringing Control Minimizes EMI
! Ripple Reduction at Light Loads
! 6-pin SOT23 Package
3 Applications
The AS1325 is ideal for low-power applications where
ultra-small size is critical as in medical diagnostic equip-
ment, hand-held instruments, pagers, digital cameras,
remote wireless transmitters, cordless phones, and PC
cards. The device is also perfect as a local supply or as
a battery backup.
2
BATT
+1.5 to +3.3V or
+1.5 to +5.0V
Battery
CIN
22µF
L1
10µH
4
LX
On 1
Off SHDNN
+5.0V Output only
5
OUT
COUT
22µF
AS1325
6
RESETN
+3.3 or
+5.0V
Output
R1
100kΩ
RESETN
Output
3
GND
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AS1325 Даташит, Описание, Даташиты
AS1325
Data Sheet - Pinout
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
SHDNN 1
6 RESETN
BATT 2 AS1325 5 OUT
GND 3
4 LX
Pin Descriptions
Table 1. Pin Descriptions
Name
Pin Number
SHDNN
1
BATT
GND
LX
OUT
RESETN
2
3
4
5
6
Description
Active-Low Logic Shutdown Input
0 = The AS1325 is off and the supply current is 1µA (typ).
1 = The AS1325 is on.
Battery Voltage Input
Ground
External Inductor Connection
Output Voltage
Active-Low reset output
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AS1325 Даташит, Описание, Даташиты
AS1325
Data Sheet - Absolute Maximum Ratings
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in Section 6 Electrical
Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
Table 2. Absolute Maximum Ratings
Parameter
Min Max Units
Comments
All Pins to GND
-0.3 7
V
LX Current
1A
Latch-Up
-100
100
mA
JEDEC 78
Package Power Dissipation
(TAMB = +70ºC)
Operating Temperature Range
500 mW
-40 +85
ºC
(ΘJA = 9.1mW/ºC above +70ºC)
Electrostatic Discharge
-500 +500
V
HBM MIL-Std. 883E 3015.7 methods
Humidity (Non-Condensing)
Storage Temperature Range
Junction Temperature
Package Body Temperature
5 85
-55 125
150
260
%
ºC
ºC
The reflow peak soldering temperature (body
temperature) specified is in compliance with
ºC IPC/JEDEC J-STD-020C “Moisture/ Reflow
Sensitivity Classification for Non-Hermetic
Solid State Surface Mount Devices”.
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