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AS1320 PDF даташит

Спецификация AS1320 изготовлена ​​​​«AMSCO» и имеет функцию, называемую «Step-Up DC-DC Converter».

Детали детали

Номер произв AS1320
Описание Step-Up DC-DC Converter
Производители AMSCO
логотип AMSCO логотип 

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AS1320 Даташит, Описание, Даташиты
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austriamicrosystems
AS1320
200mA Step-Up DC-DC Converter
Data Sheet
1 General Description
The AS1320 is a high-efficiency step-up DC-DC con-
verter designed to generate a fixed voltage of +3.3V.
The AS1320 achieves an efficiency of up to 90%. The
minimum input voltage is 1.5V, the output voltage is
fixed at 3.3V, and output current is up to 200mA (@ 2V).
In order to save power the AS1320 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 AS1320 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 AS1320 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, thus an
external transistor or Schottky diode is not required.
The AS1320 is available in a 6-pin SOT23 package.
2 Key Features
! Fixed Output Voltage: 3.3V
! Output Current: Up to 200mA (@ 2V)
! Internal Synchronous Rectifier
! Requires No External Schottky Diode or FETs
! Shutdown Mode Supply Current: Less Than 1µA
! Efficiency: Up to 90%
! Minimum Input Voltage: +1.5V
! Accurate Shutdown Low-Battery Cutoff Threshold
! Battery Input Connected to Pin OUT in Shutdown
Mode for Backup Power
! 6-pin SOT23 Package
3 Applications
The AS1320 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 3.3V supply or as a
battery backup.
Figure 1. Application Diagram
2
BATT
+1.5 to +3.5V
Battery
CIN
22µF
L1
10µH
4
LX
On 1
Off SHDNN
AS1320
5
OUT
COUT
22µF
6
RESETN
+3.3V
Output
R1
100k
RESETN
Output
3
GND
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AS1320 Даташит, Описание, Даташиты
AS1320
Data Sheet
austriamicrosystems
4 Absolute Maximum Ratings
Stresses beyond those listed in Table 1 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 5 Electrical
Characteristics on page 3 is not implied. Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
Table 1. 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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AS1320 Даташит, Описание, Даташиты
AS1320
Data Sheet
austriamicrosystems
5 Electrical Characteristics
TAMB = -40 to +85ºC, VBATT = +2V, VOUT = +3.3, VSHDNN = +1.5V (unless otherwise specified). Typ values @ TAMB = +25ºC.
Table 2. Electrical Characteristics
Parameter
Battery Input Range
Startup Battery Input Voltage 1
Output Voltage 2
N-Channel
On-Resistance
P-Channel On-Resistance
N-Channel Switch Current Limit 1
Switch Maximum
On-Time
Synchronous Rectifier
Zero-Crossing Current
Quiescent Current into OUT
Shutdown Current into OUT
Quiescent Current into BATT
Shutdown Current into BATT
SHDNN Logic Low 1
SHDNN Threshold
SHDNN Threshold Hysteresis
RESETN Threshold
RESETN Voltage Low
RESETN Leakage Current
LX Leakage Current
Maximum Load Current
Efficiency
Symbol
VBATT
VSU
VOUT
RNCH
RPCH
IMAX
tON
Conditions
RLOAD = 47, TAMB = +25ºC
RLOAD = 47, TAMB = -40 to +85ºC
TAMB = +25ºC
TAMB = -40 to +85ºC
ILX = 100mA, TAMB = +25ºC
ILX = 100mA, TAMB = -40 to +85ºC
ILX = 100mA, TAMB = +25ºC
ILX = 100mA, TAMB = -40 to +85ºC
TAMB = +25ºC
TAMB = -40 to +85ºC
TAMB = +25ºC
TAMB = -40 to +85ºC
TAMB = +25ºC
TAMB = -40 to +85ºC
VOUT = +3.5V, TAMB = +25ºC
VOUT = +3.5V, TAMB = -40 to +85ºC
VSHDNN = 0V, TAMB = +25ºC
VSHDNN = 0V, TAMB = -40 to +85ºC
VOUT = +3.5V, TAMB = +25ºC
VOUT = +3.5V, TAMB = -40 to +85ºC
VSHDNN = 0V, TAMB = +25ºC
VSHDNN = 0V, TAMB = -40 to +85ºC
VBATT = +1.5 to +3.5V
Rising Edge, TAMB = +25ºC
Rising Edge, TAMB = -40 to +85ºC
ILOAD
η
Falling Edge, TAMB = +25ºC
Falling Edge, TAMB = -40 to +85ºC
IRESETN = 1mA, VOUT = +2.5V,
TAMB = +25ºC
IRESETN = 1mA, VOUT = +2.5V,
TAMB = -40 to +85ºC
VRESETN = +5.5V, TAMB = +25ºC
VRESETN = +5.5V, TAMB = +85ºC
TAMB = +25ºC
TAMB = +85ºC
VBATT = +2V
VBATT = +3V, ILOAD = 100mA
Min
1.5
3.267
3.217
Typ
1.22
1.24
3.300
0.3
0.4
550 700
450
57
4
8 30
0
35
0.01
0.01
0.01
1.185
1.170
2.830
2.800
1.228
0.02
3.000
0.1
1
0.1
10
200
90
Max
3.5
1.5
3.333
3.373
1.2
1.5
1.3
1.6
850
950
9
10
60
65
55
60
1
2
1
2
1
2
0.3
1.271
1.286
3.110
3.140
0.15
0.2
100
1000
Unit
V
V
V
mA
µs
mA
µA
µA
µA
µA
V
V
V
V
V
nA
nA
mA
%
1. Guaranteed by design.
2. Voltage which triggers next loading cycle. Ripple and rms value depend on external components.
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