AS1323

AS1323
1.6μA Quiescent Current, Single Cell,
DC-DC Step-up Converter
General Description
The AS1323 high-efficiency step-up DC-DC converter was
designed specifically for single-cell, battery-powered devices
where lowest quiescent current and high efficiency are
essential.
The compact device is available in three fixed-voltage variants
with Vout of 2.7V, 3.0V, and 3.3V. It is perfect for a wide variety
of applications where low quiescent currents and small form
factors are critical.
Integrated boot circuitry ensures start-up even with very-high
load currents.
The true output disconnect feature completely disconnects the
output from the battery during shutdown.
The device is available in a TSOT23-5 pin package.
Ordering Information and Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS1323, 1.6μA Quiescent Current,
Single Cell, DC-DC Step-up Converter are listed below:
Figure 1:
Added Value of Using AS1323
Benefits
Features
Extended battery life
• 1.6μA Quiescent Current
• Shutdown Current 0.1μA
• Efficiency Up to 85%
Suitable to wide variety of applications
•
•
•
•
•
•
Enables cost effective PCB design
• No External Diode or FETs Needed
• TSOT23-5 Package
ams Datasheet
[v1-11] 2014-Dec-16
Input Voltage Range: 0.75 to 2V
Fixed Output Voltages: 2.7, 3.0 and 3.3V
Output Voltage Accuracy: ±3%
Up to 100mA Output Current
Output Disconnect in Shutdown
Guaranteed 0.95V Start-Up Voltage
Page 1
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AS1323 − General Description
Applications
The devices are ideal for single-cell portable devices including
mobile phones, MP3 players, PDAs, remote controls, personal
medical devices, wireless transmitters and receivers, and any
other battery-operated, portable device.
Figure 2:
Typical Operating Circuit
10µH
1
5
VBATT
10µF
3
1
VSS
2
SHDNN
3
5
LX
4
VOUT
LX
AS1323
SHDNN
VBATT
2
VSS
AS1323
4
VOUT
10µF
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Pin Assignment
Pin Assignment
Figure 3:
Pin Diagram (Top View)
VBATT 1
VSS 2
5 LX
AS1323
SHDNN 3
4 VOUT
Pin Description
Figure 4:
Pin Description
Pin Number
Pin Name
1
VBATT
2
VSS
Negative Supply and Ground
3
SHDNN
Shutdown Input.
0 = Shutdown mode.
1 = Normal operating mode.
4
VOUT
5
LX
ams Datasheet
[v1-11] 2014-Dec-16
Description
Battery Supply Input and Coil Connection
Output. This pin also supplies bootstrap power to the device.
Inductor Connection. This pin is connected to the internal N-channel
MOSFET switch drain and P-channel synchronous rectifier drain.
Page 3
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AS1323 − Absolute Maximum Ratings
Stresses beyond those listed in Absolute Maximum Ratings 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 Electrical
Characteristics is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device
reliability.
Absolute Maximum Ratings
Figure 5:
Absolute Maximum Ratings
Parameter
Min
Max
Units
VBATT, SHDNN, LX to VSS
-0.3
+5
V
Maximum Current VOUT, LX
1
A
Thermal Resistance ΘJA
207.4
ºC/W
Electro-Static Discharge
±2
kV
Operating Temperature Range
-40
85
ºC
Storage Temperature Range
-65
150
ºC
150
ºC
Junction Temperature
Package Body Temperature
Relative Humidity
non-condensing RHNC
Moisture Sensitivity Level MSL
Page 4
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5
260
ºC
85
%
Comments
on PCB
HBM
The reflow peak soldering temperature
(body temperature) specified is in
accordance with IPC/JEDEC J-STD-020
“Moisture/Reflow Sensitivity
Classification for Non-Hermetic Solid
State Surface Mount Devices”.
The lead finish for Pb-free leaded
packages is matte tin (100% Sn).
1
ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Electrical Characteristics
Electrical Characteristics
DC Electrical Characteristics
TAMB = -40°C to 85°C, VBATT = 1.2V, VOUT = VOUT (NOM),
SHDNN = VOUT, RLOAD = ∞ , unless otherwise noted. Typical values
are at TA = 25°C.(unless otherwise specified). Limits are 100%
production tested at TAMB = 25ºC. Limits over the operating
temperature range are guaranteed by design.
Figure 6:
Electrical Characteristics
Symbol
Parameter
Condition
VINMIN
Minimum Input Voltage
VIN
Operating Input Voltage
TAMB = 25ºC
Minimum Start-Up
Input Voltage
TAMB = 25ºC,
RLOAD = 100Ω
VINSU
VOUT
RLOAD
Min
Typ
Max
0.75
0.95
V
2
V
0.75
0.95
V
AS1323-27
2.619
2.7
2.781
AS1323-30
2.91
3.0
3.09
AS1323-33
3.201
3.3
3.399
30
40
mV
N-Channel ON-Resistance
0.5
1.0
Ω
P-Channel ON-Resistance
0.75
1.5
Ω
Output Voltage
Load depended drop
of VOUT
VBATT = 1.5V;
ILOAD = 45mA
RDS-ON
ILIMIT
tON
Unit
N-Channel Switch
Current Limit
Programmed at
400mA
V
400
mA
Switch Maximum ON-Time
6
μs
Synchronous Rectifier
Zero-Crossing Current
10
mA
6
μA
IOP-OUT
Operating Current
into VBATT
IQ-OUT
Quiescent Current to VOUT
IQ-BAT
Quiescent Current into VBATT
ams Datasheet
[v1-11] 2014-Dec-16
VBATT = 1.5V,
VOUT = 3.3V,
TAMB = 25ºC
VBATT = 1.5V,
TAMB = 25ºC
1.6
3
μA
0.3
1
μA
Page 5
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AS1323 − Electrical Characteristics
Symbol
ISDI-OUT (1)
Parameter
Condition
Min
Typ
Shutdown Current to VOUT
ISDI-BAT
Shutdown Current into VBATT
VIL
SHDNN Voltage Threshold, Low
VIH
SHDNN Voltage Threshold, High
ISDI
SHDNN Input Bias Current
VBATT = 1.5V,
TAMB = 25ºC
Max
Unit
200
nA
100
nA
150
TAMB = 25ºC,
VSDI = VOUT
mV
100
900
mV
300
nA
Note(s) and/or Footnote(s):
1. VOUT is completely disconnected (0V) during shutdown.
2. All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality
Control) methods.
Page 6
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Typical Operating Characteristics
Typical Operating
Characteristics
VOUT= 3.3V; TA = 25 °C; CIN = COUT = 10μF, L = 10μH,
ILOAD = 10mA; VBATT = 1.5V; unless otherwise specified.
Figure 7:
Efficiency vs. Output Current; VOUT = 3.3V
90
VIN = 1.8V
Efficiency (%) .
80
VIN = 1.2V
VIN = 1.5V
VIN = 0.95V
70
60
50
40
30
0.1
1
10
100
Output Current (mA)
Figure 8:
Efficiency vs. Output Current; VOUT = 3.0V
90
VIN = 1.8V
80
Efficiency (%) .
VIN = 1.5V
VIN = 1.2V
70
VIN = 0.95V
60
50
40
30
0.1
1
10
100
Output Current (mA)
ams Datasheet
[v1-11] 2014-Dec-16
Page 7
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AS1323 − Typical Operating Characteristics
Figure 9:
Efficiency vs. Output Current; VOUT = 2.7V
90
VIN = 1.8V
80
Efficiency (%) .
VIN = 1.5V
VIN = 1.2V
70
VIN = 0.95V
60
50
40
30
0.1
1
10
100
Output Current (mA)
Figure 10:
Efficiency vs. Input Voltage
90
Efficiency (%) .
80
70
60
50
Il oad = 80µA
40
Il oad = 800µA
Il oad = 11mA
30
0.75
1
1.25
1.5
1.75
2
Input Voltage (V)
Page 8
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Typical Operating Characteristics
Figure 11:
Output Voltage vs. Temperature
3.32
Output Voltage (V) .
3.315
No Load
3.31
3.305
ILOAD = 10mA
3.3
3.295
ILOAD = 30mA
3.29
3.285
3.28
-50
-25
0
25
50
75
100 125
Temperature (°C)
Figure 12:
Output Voltage vs. Output Current
3.4
Output Voltage (V) .
3.35
VIN = 1.5V
3.3
VIN = 1.2V
3.25
3.2
3.15
3.1
3.05
3
0
10
20
30
40
50
60
70
Output Current (mA)
ams Datasheet
[v1-11] 2014-Dec-16
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AS1323 − Typical Operating Characteristics
Figure 13:
Output Voltage vs. Input Voltage
3.4
Output Voltage (V) .
3.38
3.36
3.34
3.32
3.3
3.28
3.26
3.24
3.22
3.2
0.9
1
1.1 1.2 1.3 1.4 1.5 1.6 1.7
Input Voltage (V)
Figure 14:
Shutdown Current vs. Temperature
Input Current (nA) .
1000
100
VIN = 1.5V
VIN = 1.2V
10
1
0.1
-50
-25
0
25
50
75
100
125
Temperature (°C)
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Typical Operating Characteristics
Figure 15:
Minimum Input Startup Voltage vs. Temperature
Input Voltage (V) .
1
0.9
0.8
0.7
0.6
0.5
-50
-25
0
25
50
75
100
125
Temperature (°C)
Figure 16:
Output Voltage vs. Input Voltage; VOUT = 2.7V
2.78
Output Voltage (V) .
2.76
2.74
IOUT = 0mA
2.72
IOUT = 10mA
2.7
IOUT = 30mA
2.68
2.66
2.64
2.62
0.75
1
1.25
1.5
1.75
2
Input Voltage (V)
ams Datasheet
[v1-11] 2014-Dec-16
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AS1323 − Typical Operating Characteristics
Figure 17:
Output Voltage vs. Input Voltage; VOUT = 3.0V
3.1
Output Voltage (V) .
3.08
3.06
3.04
IOUT = 0mA
3.02
IOUT = 10mA
3
2.98
IOUT = 30mA
2.96
2.94
2.92
2.9
0.75
1
1.25
1.5
1.75
2
Input Voltage (V)
Figure 18:
Output Voltage vs. Input Voltage; VOUT = 3.3V
3.4
Output Voltage (V) .
3.38
3.36
3.34
IOUT = 0mA
IOUT = 10mA
3.32
3.3
IOUT = 30mA
3.28
3.26
3.24
3.22
3.2
0.75
1
1.25
1.5
1.75
2
Input Voltage (V)
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Typical Operating Characteristics
Figure 19:
Output Current vs. Input Voltage
110
.
100
Output Current (mA)
90
80
VOUT = 3.0V
70
VOUT = 3.3V
60
VOUT = 2.7V
50
40
30
20
0.75
1
1.25
1.5
1.75
2
Input Voltage (V)
Figure 20:
SHDNN Threshold vs. Input Voltage
SHDNN Threshold Voltage (V) .
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.8
1
1.2
1.4
1.6
1.8
2
Input Voltage (V)
ams Datasheet
[v1-11] 2014-Dec-16
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AS1323 − Typical Operating Characteristics
ILX
20mA/DIV
VLX
2V/Div
VOUT
50mV/Div
Figure 21:
Switching Waveform; VOUT = 2.7V
200µs/Div
ILX
20mA/DIV
VLX
2V/Div
VOUT
50mV/Div
Figure 22:
Switching Waveform; VOUT = 3.0V
200µs/Div
Page 14
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Typical Operating Characteristics
ILX
20mA/DIV
VLX
2V/Div
VOUT
50mV/Div
Figure 23:
Switching Waveform; VOUT = 3.3V
200µs/Div
ams Datasheet
[v1-11] 2014-Dec-16
Page 15
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AS1323 − Detailed Description
The AS1323 is a compact, high-efficiency, step-up DC-DC
converter guaranteed to start up with voltages as low as 0.95V,
and operate with an input voltage down to 0.75V. Consuming
only 1.6μA of quiescent current, the device includes an
integrated synchronous rectifier that eliminates the need for an
external diode and improves overall efficiency by minimizing
losses (see Synchronous Rectification). The AS1323 also
features an active-low shutdown circuit that supply current to
0.1μA.
Detailed Description
Figure 24:
AS1323 Block Diagram
L1
4
1
0.95 to
1.6V
VOUT
VBATT
CIN
COUT
Comparator
Discharge
Comparator
Voltage
Control
Logic
Startup
System
Timing
3
SHDNN
AS1323
5
LX
Ref
Comparator
Charge
2
VSS
PFM Control
A forced discontinuous, current-limited, pulse-frequency
modulation (PFM) control scheme provides ultra-low quiescent
current and high efficiency over a wide output current-range.
Rather than using an integrated oscillator, the inductor current
is limited by the 400mA N-channel current limit or by the 6μs
switch maximum ON-time. After each device-ON cycle, the
inductor current must ramp to zero before another cycle can
start. When the error comparator senses that the output has
fallen below the regulation threshold, another cycle can begin.
Page 16
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Detailed Description
Synchronous Rectification
The integrated synchronous rectifier eliminates the need for an
external Schottky diode, reducing cost and PCB space. During
normal operation, while the inductor discharges, the P-channel
MOSFET turns on and shunts the MOSFET body diode.
Consequently the rectifier voltage drop is significantly reduced
improving efficiency without the need for external
components.
Low-Voltage Startup Circuit
The AS1323 contains a unique low-voltage startup circuit which
ensures start-up even with very high load currents. The
minimum start-up voltage is independent of the load current.
This device is powered from pin VBATT, guaranteeing startup
at input voltages as low as 0.95V.
Shutdown
The AS1323 enter shutdown when the SHDNN pin is driven low.
During shutdown, the output is completely disconnected from
the battery. Shutdown can be pulled as high as 3.6V, regardless
of the voltage at pins VBATT or VOUT. For normal operation,
connect SHDNN to the input.
ams Datasheet
[v1-11] 2014-Dec-16
Page 17
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AS1323 − Application Information
Application Information
Figure 25:
Typical Application Diagram
10µH
1
5
LX
VBATT
10µF
AS1323
3
SHDNN
2
VSS
4
VOUT
10µF
Inductor Selection
The control scheme of the AS1323 allows for a wide range if
inductor values. A 10μH inductor should be sufficient for most
applications (see Figure 25).
Smaller inductance values typically offer smaller physical size
for a given series resistance, allowing the smallest overall circuit
dimensions. Applications using larger inductance values may
startup at lower battery voltages, provide higher efficiency and
exhibit less ripple, but they may reduce the maximum output
current. This occurs when the inductance is sufficiently large to
prevent the maximum current limit (ILIMIT) from being reached
before the maximum ON-time (t ON) expires
(see Figure 6).
For maximum output current, the inductor value should be
chosen such that the controller reaches the current-limit before
the maximum ON-time is triggered:
(EQ1)
V BATT ⋅ t ON
L > -------------------------------I LIMIT
t ONMAX is 6μs (typ)
ILIMIT is 400mA (typ)
For larger inductor values, the peak inductor current (IPEAK)
can be determined by:
(EQ2)
Page 18
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V BATT ⋅ t ON
I PEAK = -------------------------------L
ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Application Information
The inductor’s incremental saturation current rating should be
greater than the peak switching current. However, it is generally
advisable to bias the inductor into saturation by as much as
20%, although this will slightly reduce efficiency.
Maximum Output Current
The maximum output current (IOUT MAX) is a function of IPEAK,
VIN, VOUT, and the overall efficiency (η) as indicated in the
formula for determining IOUT MAX:
(EQ3)
1
V BATT
I OUTMAX = --- ⋅ I PEAK ⋅  ----------------- ⋅ η
 V OUT 
2
Capacitor Selection
Choose input and output capacitors to supply the input and
output peak currents with acceptable voltage ripple. The input
filter capacitor (C IN) reduces peak currents drawn from the
battery and improves efficiency. Low equivalent series
resistance (ESR) capacitors are recommended.
Note(s): Ceramic capacitors have the lowest ESR, but low ESR
tantalum or polymer capacitors offer a good balance between
cost and performance.
Output voltage ripple has two components: variations in the
charge stored in the output capacitor with each COIL pulse, and
the voltage drop across the capacitor’s ESR caused by the
current into and out of the capacitor:
(EQ4)
V RIPPLE = VRIPPLE(C) + V RIPPLE(ESR)
(EQ5)
V RIPPLE(ESR) = IPEAK R ESR(COUT
(EQ6)
2
2
1
L
V RIPPLE ( C ) ≈ --- ⋅  -------------------------------------------------------------- ⋅ ( I PEAK – I OUT )
2  ( V OUT – V BATT ) ⋅ C OUT
Where: IPEAK is the peak inductor current.
For ceramic capacitors, the output voltage ripple is typically
dominated by VRIPPLE(C). For example, a 10μF ceramic capacitor
and a 10μH inductor typically provide 75mV of output ripple
when stepping up from 1.2V to 3.3V at 50mA. Low
input-to-output voltage differences require higher output
capacitor values.
Capacitance and ESR variation of temperature should be
considered for best performance in applications with wide
operating temperature ranges.
ams Datasheet
[v1-11] 2014-Dec-16
Page 19
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AS1323 − Application Information
PC Board Layout Considerations
The AS1323 has been specially designed to be tolerant to PC
board parasitic inductances and resistances. However, to
achieve maximum efficiency a careful PC board layout and
component selection is vital.
Note(s): For the optimal performance, the IC’s VSS and the
ground leads of the input and output capacitors must be kept
less than 5mm apart using a ground plane. In addition, keep all
connections to COIL as short as possible.
The system robustness guarantees a reliable operation even if
those recommendations are not fully applied.
Page 20
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Package Drawings & Markings
Package Drawings & Markings
The device is available in an TSOT23-5 package.
Figure 26:
TSOT23-5 Package
RoHS
Green
Symbol
A
A1
A2
b
b1
c
c1
D
E
E1
e
e1
Min
0.01
0.84
0.30
0.31
0.12
0.08
Typ
0.05
0.87
0.35
0.15
0.13
2.90BSC
2.80BSC
1.60BSC
0.95BSC
1.90BSC
Max
Notes
1.00
0.10
0.90
0.45
0.39
0.20
0.16
3,4
3,4
3,4
Symbol
Min
Typ
Max
L
L1
L2
N
R
R1
q
θ1
0.30
0.40
0.60REF
0.25BSC
5
0.50
0.10
0.10
0º
4º
4º
10º
Notes
0.25
8º
12º
Tolerances of Form and Position
aaa
bbb
ccc
ddd
0.15
0.25
0.10
0.20
Note(s) and/or Footnote(s):
1. Dimensions are in millimeters.
2. Dimension D does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, and gate burrs shall not exceed 0.15mm
per end. Dimension E1 does not include interlead flash or protrusion. Interlead flash or protrusion shall not exceed 0.15mm per side.
Dimensions D and E1 are determined at datum H.
3. The package top can be smaller than the package bottom. Dimensions D and E1 are determined at the outermost extremes of the
plastic body exclusive of mold flash, tie bar burrs, gate burrs, and interlead flash, but include any mismatches between the top of
the package body and the bottom. D and E1 are determined at datum H.
ams Datasheet
[v1-11] 2014-Dec-16
Page 21
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AS1323 − Package Drawings & Mark ings
Figure 27:
AS1323 Marking
Top Marking
Bottom Marking
Pin1
Pin1
Figure 28:
Packaging Markings:
YYYY
XXXX
Marking code
Trace code
Note(s) and/or Footnote(s):
1. See Figure 30 for ordering codes of different AS1323 variants.
Page 22
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Package Drawings & Markings
Tape and Reel Pin1 Orientation
Figure 29:
Tape & Reel Pin1 Orientation
User direction of feed
Top, Through View
TSOT23-5
ams Datasheet
[v1-11] 2014-Dec-16
TSOT23-5
TSOT23-5
TSOT23-5
Page 23
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AS1323 − Ordering & Contact Information
Ordering & Contact Information
The device is available as the standard products shown in the
figure below.
Figure 30:
Ordering Information
Ordering
Code
Marking
Output
Description
Delivery
Form
Package
AS1323-BTTT-27
ASJN
2.7V
1.6μA Quiescent Current, Single
Cell, DC-DC Step-up Converter
Tape and Reel
TSOT23-5
AS1323-BTTT-30
ASMP
3.0V
1.6μA Quiescent Current, Single
Cell, DC-DC Step-up Converter
Tape and Reel
TSOT23-5
AS1323-BTTT-33
ASMQ
3.3V
1.6μA Quiescent Current, Single
Cell, DC-DC Step-up Converter
Tape and Reel
TSOT23-5
Buy our products or get free samples online at:
www.ams.com/ICdirect
Technical Support is available at:
www.ams.com/Technical-Support
Provide feedback about this document at:
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Headquarters
ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten
Austria, Europe
Tel: +43 (0) 3136 500 0
Website: www.ams.com
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − RoHS Compliant & ams Green Statement
RoHS Compliant & ams Green
Statement
RoHS: The term RoHS compliant means that ams AG products
fully comply with current RoHS directives. Our semiconductor
products do not contain any chemicals for all 6 substance
categories, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. Where designed to
be soldered at high temperatures, RoHS compliant products are
suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br): ams Green
defines that in addition to RoHS compliance, our products are
free of Bromine (Br) and Antimony (Sb) based flame retardants
(Br or Sb do not exceed 0.1% by weight in homogeneous
material).
Important Information: The information provided in this
statement represents ams AG knowledge and belief as of the
date that it is provided. ams AG bases its knowledge and belief
on information provided by third parties, and makes no
representation or warranty as to the accuracy of such
information. Efforts are underway to better integrate
information from third parties. ams AG has taken and continues
to take reasonable steps to provide representative and accurate
information but may not have conducted destructive testing or
chemical analysis on incoming materials and chemicals. ams AG
and ams AG suppliers consider certain information to be
proprietary, and thus CAS numbers and other limited
information may not be available for release.
ams Datasheet
[v1-11] 2014-Dec-16
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AS1323 − Copyrights & Disclaimer
Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141
Unterpremstaetten, Austria-Europe. Trademarks Registered. All
rights reserved. The material herein may not be reproduced,
adapted, merged, translated, stored, or used without the prior
written consent of the copyright owner.
Devices sold by ams AG are covered by the warranty and patent
indemnification provisions appearing in its General Terms of
Trade. ams AG makes no warranty, express, statutory, implied,
or by description regarding the information set forth herein.
ams AG reserves the right to change specifications and prices
at any time and without notice. Therefore, prior to designing
this product into a system, it is necessary to check with ams AG
for current information. This product is intended for use in
commercial applications. Applications requiring extended
temperature range, unusual environmental requirements, or
high reliability applications, such as military, medical
life-support or life-sustaining equipment are specifically not
recommended without additional processing by ams AG for
each application. This product is provided by ams AG “AS IS”
and any express or implied warranties, including, but not
limited to the implied warranties of merchantability and fitness
for a particular purpose are disclaimed.
ams AG shall not be liable to recipient or any third party for any
damages, including but not limited to personal injury, property
damage, loss of profits, loss of use, interruption of business or
indirect, special, incidental or consequential damages, of any
kind, in connection with or arising out of the furnishing,
performance or use of the technical data herein. No obligation
or liability to recipient or any third party shall arise or flow out
of ams AG rendering of technical or other services.
Page 26
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ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Document Status
Document Status
Document Status
Product Preview
Preliminary Datasheet
Datasheet
Datasheet (discontinued)
ams Datasheet
[v1-11] 2014-Dec-16
Product Status
Definition
Pre-Development
Information in this datasheet is based on product ideas in
the planning phase of development. All specifications are
design goals without any warranty and are subject to
change without notice
Pre-Production
Information in this datasheet is based on products in the
design, validation or qualification phase of development.
The performance and parameters shown in this document
are preliminary without any warranty and are subject to
change without notice
Production
Information in this datasheet is based on products in
ramp-up to full production or full production which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade
Discontinued
Information in this datasheet is based on products which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade, but these products have been superseded and
should not be used for new designs
Page 27
Document Feedback
AS1323 − Revision Information
Revision Information
Changes from 1.05 (2010-May) to current revision 1-11 (2014-Dec-16)
Page
Content of austriamicrosystems datasheet was converted to latest ams design
Updated General Description section
1
Updated Figure 5
4
Added Figure 20
13
Updated description of Inductor Selection
18
Updated Marking Information and Packaging Code
22
Note(s) and/or Footnote(s):
1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
2. Correction of typographical errors is not explicitly mentioned.
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Document Feedback
ams Datasheet
[v1-11] 2014-Dec-16
AS1323 − Content Guide
Content Guide
ams Datasheet
[v1-11] 2014-Dec-16
1
1
2
General Description
Key Benefits & Features
Applications
3
3
Pin Assignment
Pin Description
4
Absolute Maximum Ratings
5
5
Electrical Characteristics
DC Electrical Characteristics
7
Typical Operating Characteristics
16
16
17
17
17
Detailed Description
PFM Control
Synchronous Rectification
Low-Voltage Startup Circuit
Shutdown
18
18
19
19
20
Application Information
Inductor Selection
Maximum Output Current
Capacitor Selection
PC Board Layout Considerations
21
23
Package Drawings & Markings
Tape and Reel Pin1 Orientation
24
25
26
27
28
Ordering & Contact Information
RoHS Compliant & ams Green Statement
Copyrights & Disclaimer
Document Status
Revision Information
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