AS1346-BTDT-3318 - Austriamicrosystems

AS1346, AS1347, AS1348, AS1349

Dual Step-Down Converter with Battery Monitoring

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 1 - 16

Datasheet

1 General Description

The AS1346, AS1347, AS1348, AS1349 family is a high-efficiency,

constant-frequency dual buck converter available with fixed voltage

versions. The device provides two independent DC/DC Converters

with output currents between 0.5A and 1.2A. The wide input voltage

range (2.7V to 5.5V), automatic powersave mode and minimal

external component requirements make the AS134x family perfect

for SSD and many other battery-powered applications.

In shutdown mode the typical supply current decreases to ≤1µA.

The highly efficient duty cycle (100%) provides low dropout

operation, prolonging battery life in portable systems.

An internal synchronous switching scheme increases efficiency and

eliminates the need for an external Schottky diode. The fixed

switching frequency (2.0MHz) allows the use of small surface mount

inductors.

The integrated monitoring function can be configured that either the

output voltage (Power Okay function ) or the input voltage (Battery

Monitoring Function) can be supervised.

The AS1346 is available in a 12-Pin TDFN 3x3mm package.

2 Key Features

 High Efficiency: Up to 95%

 Output Current: see Table 1

 Input Voltage Range: 2.7V to 5.5V

 Output Voltage Range: 1.2V to 3.6V (available in 100mV steps)

 Constant Frequency Operation: 2.0MHz

 180º Out of Phase Operation

 Low Battery Detection

 Low Dropout Operation: 100% Duty Cycle

 Shutdown Mode Supply Current: ≤1µA

 No Schottky Diode Required

 Output Disconnect in Shutdown

 Non standard variants available within two weeks

 12-Pin TDFN 3x3mm Package

3 Applications

The device is ideal for SSD applications, mobile communication

devices, laptops and PDAs, ultra-low-power systems, threshold

detectors/discriminators, telemetry and remote systems, medical

instruments, or any other space-limited application with low power-

consumption requirements.

Table 1. Available Products

Devices IOUT1 IOUT2

AS1346 1.2A 0.5A

AS1347 0.5A 0.5A

AS1348 0.5A 0.95A

AS1349 1.2A 1.2A

AS1346

COUT1

CIN

VIN

2.7V to 5.5V

VOUT1

3.3V 1200mA

Figure 1. AS1346 - T ypical Application Diagram with POK Function

SW1

COUT2

VOUT2

1.8V 500mA

FB1

FB2

SW2

AGND

EN2

PVIN

VDD

EN1

LBO

LBI

L1 = 3.3µH

POK Function

L2 = 3.3µH

PVIN

PGND

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 2 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Pin Assignments

4 Pin Assignments

Figure 2. Pin Assignments (Top View)

4.1 Pin Descriptions

Table 2. Pin Descriptions

Pin Number Pin Name Description

1SW1

Switch Node1 Connection to Inductor. This pin connects to the drains of the internal main and

synchronous power MOSFET switches.

2, 11 PVIN Power Supply Connector. This pin must be closely decoupled to PGND with a ≥ 4.7µF ceramic

capacitor.

3EN1

Enable1 Input. Driving this pin above 1.2V enables VOUT1. Driving this pin below 0.5V puts the device in

shutdown mode. In shutdown mode all functions are disabled, drawing ≤1µA supply current.

This pin should not be left floating.

4FB1 Feedback Pin 1. Feedback input to the error amplifier, connect this pin to VOUT1. The output can be

factory set from 1.2V to 3.6V. For further information see Ordering Information on page 15.

5EN2

Enable2 Input. Driving this pin above 1.2V enables VOUT2. Driving this pin below 0.5V puts the device in

shutdown mode. In shutdown mode all functions are disabled, drawing ≤1µA supply current.

This pin should not be left floating.

6LBO

Low Battery Comperator Output. This open-drain output is low when:

- the voltage on LBI is higher than 1.2V or

- LBI is connected to GND and VOUT1 is below 92.5% of its nominal value.

7LBI

Low Battery Comperator Input. 1.2V Threshold. May not be left floating. If connected to GND, LBO is

working as Output Power Okay for VOUT1.

8AGND Analog Ground.

9FB2 Feedback 2 Pin. Feedback input to the error amplifier, connect this pin to VOUT2. The output can be

factory set from 1.2V to 3.6V. For further information see Ordering Information on page 15.

10 VDD Supply Connector. Connect this pin to PVIN

12 SW2 Switch Node2 Connection to Inductor. This pin connects to the drains of the internal main and

synchronous power MOSFET switches.

13 PGND Exposed Pad. The exposed pad must be connected to AGND. Ensure a good electrical connection to the

PCB to achieve optimal thermal performance.

AS1346

PVIN 2

FB1 4

SW1 1

EN1 3

FB2

VDD

PVIN

SW2

EN2 5AGND

LBO 6LBI

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 3 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Absolute Maximum Ratings

5 Absolute Maximum Ratings

Stresses beyond those listed in Table 3 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 on page 4 is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

Table 3. Absolute Maximum Ratings

Parameter Min Max Units Notes

Electrical Parameters

VDD, PVIN to AGND -0.3 +7.0 V

PGND to AGND -0.3 +0.3 V

EN, FB AGND - 0.3 VDD + 0.3 V 7.0V max

SW PGND - 0.3 PVIN + 0.3 V

PVIN to VDD -0.3 +0.3 V

Ambient Temperature (TA) Range -40 +85 ºC

In applications where high power dissipation and/

or poor package thermal resistance is present,

the maximum ambient temperature may have to

be derated.

Maximum ambient temperature (TA-MAX) is

dependent on the maximum operating junction

temperature (TJ-MAX-OP = 125ºC), the maximum

power dissipation

of the device in the application (PD-MAX), and the

junction-to ambient thermal resistance of the

part/package in the application (θJA), as given by

the following

equation: TA-MAX = TJ-MAX-OP – (θJA × PD-MAX).

Electrostatic Discharge

Human Body Model 1 kV Norm: MIL 883 E method 3015

Temperature Ranges and Storage Conditions

Junction Temperature (TJ-MAX)+150 ºC

Storage Temperature Range -55 +150 ºC

Package Body Temperature +260 ºC

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).

Humidity non-condensing 5 85 %

Moisture Sensitive Level 1 Represents a max. floor life time of unlimited

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 4 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Electrical Characteristics

6 Electrical Characteristics

TA = TJ = -40ºC to +85ºC; PVIN = VDD = EN = 5V, unless otherwise noted

Typical values are at TA=25°C.

Table 4. Electrical Characteristics

Symbol Parameter Conditions Min Typ Max Units

TAOperating Temperature Range -40 +85 °C

VIN Input Voltage Range VIN ≥ VOUT 2.7 5.5 V

VOUT Output Voltage Range (see Table 8 on page 15) 1.2 3.6 V

IQ Quiescent Supply Current122.8 mA

IOUT1 Output current 1

AS1346, VOUT1 = 3.3V 1200 mA

AS1347 500 mA

AS1348 500 mA

AS1349 1200 mA

IOUT2 Output current 2

AS1346, VOUT2 = 1.8V 500 mA

AS1347 500 mA

AS1348 950 mA

AS1349 1200 mA

ISHDN Shutdown Current 0.1 1 µA

Regulation

VOUT1 Output Voltage 1 AS1346, IOUT1 = 100mA 3.234 3.3 3.366 V

Accuracy +2%

VOUT2 Output Voltage 2 AS1346, IOUT2 = 100mA 1.764 1.8 1.836 V

Accuracy +2%

Line Transient Response VIN = 4.5V to 5.5V, IOUT1 = 500mA,

VOUT1 = 3.3V, EN2 = 0V 50 mVpk

Load Transient Response VIN = 5V, IOUT1 = 0 to 500mA, VOUT1

= 3.3V, EN2 = 0V 50 mVpk

fOSC Oscillator frequency 1.8 2 2.2 MHz

tON Turn on time 350 µs

DC-DC Switches

ISW1 SW1 Current Limit AS1346 1.55 A

ISW2 SW2 Current Limit AS1346 800 mA

RDSON1(P) Pin-Pin Resistance for PMOS1 VDD = 5.0V, ISW = 200mA 150 mΩ

RDSON1(N) Pin-Pin Resistance for NMOS1 VDD = 5.0V, ISW = 200mA 250 mΩ

RDSON2(P) Pin-Pin Resistance for PMOS2 VDD = 5.0V, ISW = 200mA 150 mΩ

RDSON2(N) Pin-Pin Resistance for NMOS2 VDD = 5.0V, ISW = 200mA 250 mΩ

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 5 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Electrical Characteristics

Enable

VIH,EN Logic high input threshold 1.2 V

VIH,EN Logic low input threshold 0.5V V

Low Battery & Power-OK

VLBI LBI Threshold Falling Edge 1.16 1.2 1.24 V

LBI Hysteresis 10 mV

LBI Leakage Current LBI = 5V, TA = 25°C 1 nA

LBO Voltage Low2ILBO = 0.1mA 0.05 V

LBO Leakage Current LBO = 5V, TA = 25°C 1 nA

Power-OK Threshold LBI = 0V, Falling Edge 85 88 90 %

1. The dynamic supply current is higher due to the gate charge delivered at the switching frequency. The Quiescent Current is measured

while the DC-DC Converter is not switching.

2. LBO goes low in startup mode as well as during normal operation if,

1) The voltage at the LBI pin is higher than LBI threshold.

2) The voltage at the LBI pin is below 0.1V (connected to GND) and VOUT1 is below 92.5% of its nominal value.

Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality

Control) methods.

Table 4. Electrical Characteristics

Symbol Parameter Conditions Min Typ Max Units

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 6 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Typical Operating Characteristics

7 Typical Operating Characteristics

Figure 3. AS1346 Efficiency vs. IOUT, VOUT1 = 3.3V Figure 4. AS1346 Efficiency vs. IOUT, VOUT2 = 1.8V

100

100 1000

Output Current (mA )

Efficiency (%)

Vin = 2.7V

Vi n = 3.0V

Vin = 3.5V

Vin = 4.5V

Vin = 5.5V

100

100 1000

Output Current (mA )

Efficiency (%)

Vin = 2.7V

Vi n = 3.0V

Vin = 3.5V

Vin = 4.5V

Vin = 5.5V

Figure 5. AS1346 Efficiency vs. VIN, VOUT1 = 3.3V Figure 6. AS1346 Efficiency vs. VIN, VOUT2 = 1.8V

100

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

Input Voltage ( V)

Efficiency (%)

Iout=100mA

Iout=300mA

Iout=500mA

Iout=700mA 50

100

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

Input Voltage (V)

Efficiency (%)

Iout=100mA

Iout=300mA

Iout=500mA

Figure 7. Efficiency vs. IOUT, VOUT1 = 2.5V Figure 8. Efficiency vs. IOUT, VOUT2 = 1.2V

100

100 1000

Output Current (mA )

Efficiency (%)

Vin = 2.7V

Vi n = 3.0V

Vin = 3.5V

Vin = 4.5V

Vin = 5.5V

100

100 1000

Output Current (mA )

Efficiency (%)

Vin = 2.7V

Vi n = 3.0V

Vin = 3.5V

Vin = 4.5V

Vin = 5.5V

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 7 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Typical Operating Characteristics

Figure 9. AS1346 Load Regulation; VIN = 4.0V, VOUT1 = 3.3V Figure 10. AS1346 Load Regulation; VIN = 4.0V, VOUT2 =1.8V

3.2

3.22

3.24

3.26

3.28

3.3

3.32

3.34

3.36

3.38

3.4

0 200 400 600 800 1000 1200

Output Current (mA)

Out put Voltage ( V)

Vin=4.5V

Vin = 5.5 1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

0 100 200 300 400 500

Output Current (mA)

Out put Voltage ( V)

Vin=4.5V

Figure 11. AS1346 Line Regulation, VOUT1 = 3.3V Figure 12. AS1346 Line Regulation, VOUT2 = 1.8V

3.1

3.15

3.2

3.25

3.3

3.35

3.4

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

Input Voltage ( V)

Out put Voltage ( V)

LDO mode

1.76

1.77

1.78

1.79

1.8

1.81

1.82

1.83

1.84

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

Input Voltage ( V)

Out put Voltage ( V)

Figure 13. AS1346 VOUT vs. Temperature; VIN = 5.5V, IOUT =

1A Figure 14. AS1346 VOUT vs. Temperature; VIN = 5.5V, IOUT =

500mA

3.23

3.25

3.27

3.29

3.31

3.33

3.35

3.37

-45 -30 -15 0 15 30 45 60 75 90

T emperat ur e ( °C)

Out put V oltage ( V )

1.76

1.77

1.78

1.79

1.8

1.81

1.82

1.83

1.84

-45 -30 -15 0 15 30 45 60 75 90

Temper atur e ( ° C)

Out put V oltage ( V )

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 8 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Typical Operating Characteristics

Figure 15. AS1346 IQ vs. VIN Figure 16. AS1346 IQ vs. VIN, both VOUT enabled

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

Input Voltage ( V)

Quiescent Current (mA) .

Vout1 on

Vout2 on

-45 -30 -15 0 15 30 45 60 75 90

Temper atur e ( ° C)

Quiescent Current (mA) .

Vin = 4.5V

Vin = 5.5V

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 9 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Detailed Description

8 Detailed Description

The AS1346, AS1347, AS1348, AS1349 family is a high-efficiency buck converter that uses a constant-frequency current-mode architecture.

The device contains two internal MOSFET switches and is available with a fixed output voltage (see Ordering Information on page 15).

Figure 17. AS1346 - Bl ock Diagram

Mosfet

Control

Logic

Shutdown

Control

Main Control

Soft Start

Current

Sense

PVIN

PWM

COMP

VDD

Error

Amplifier

FB1

EN1

SW1

AGND

AS1346

Mosfet

Control

Logic

Soft Start

Oscillator

Current

Sense

PWM

COMP

Error

Amplifier

FB2

EN2 PVIN

VDD

SW2

LBO

LBI

Power-OK

Compare

Logic

PGND

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 10 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Detailed Description

8.1 Main Control Loop

During normal operation, the internal top power MOSFET is turned on each cycle when the oscillator sets the RS latch. This switch is turned off

when the current comparator resets the RS latch. The peak inductor current (IPK) at which ICOMP resets the RS latch, is controlled by the error

amplifier. When ILOAD increases, VFB decreases slightly relative to the internal 0.6V reference, causing the error amplifier’s output voltage to

increase until the average inductor current matches the new load current.

When the top MOSFET is off, the bottom MOSFET is turned on until the inductor current starts to reverse as indicated by the current reversal

comparator, or the next clock cycle begins. The over-voltage detection comparator guards against transient overshoots >7.8% by turning the

main switch off and keeping it off until the transient is removed.

8.2 Short-Circuit Protection

The short-circuit protection turns off the power switches as long as the short is applied. When the short is removed the device is continuing

normal operation.

8.3 Dropout Operation

The AS1346, AS1347, AS1348, AS1349 is working with a low input-to-output voltage difference by operating at 100% duty cycle. In this state,

the PMOS is always on. This is particularly useful in battery-powered applications with a 3.3V output.

The AS1346, AS1347, AS1348, AS1349 allows the output to follow the input battery voltage as it drops below the regulation voltage. The

quiescent current in this state is reduced to a minimal value, which aids in extending battery life. This dropout (100% duty-cycle) operation

achieves long battery life by taking full advantage of the entire battery range.

The input voltage requires maintaining regulation and is a function of the output voltage and the load. The difference between the minimum input

voltage and the output voltage is called the dropout voltage. The dropout voltage is therefore a function of the on-resistance of the internal PMOS

(RDS(ON)PMOS) and the inductor resistance (DCR) and this is proportional to the load current.

Note: At low VIN values, the RDS(ON) of the P-channel switch increases (see Electrical Characteristics on page 4). Therefore, power dissipa-

tion should be taken in consideration.

8.4 Shutdown

Connecting EN to GND or logic low places the AS1346, AS1347, AS1348, AS1349 in shutdown mode and reduces the supply current to 0.1µA.

In shutdown the control circuitry and the internal NMOS and PMOS turn off and SW becomes high impedance disconnecting the input from the

output. The output capacitance and load current determine the voltage decay rate. For normal operation connect EN to VIN or logic high.

Note: Pin EN should not be left floating.

8.4.1 Power-OK and Low-Battery-Detect Functionality

LBO goes low in startup mode as well as during normal operation if,

- The voltage at the LBI pin is above LBI threshold (1.2V). This can be used to monitor the battery voltage.

- LBI pin is connected to GND and VOUT1 is below 92.5% of its nominal value. LBO works as a power-OK signal in this case.

The LBI pin can be connected to a resistive-divider to monitor a particular definable voltage and compare it with a 1.2V internal reference. If LBI

is connected to GND (see Figure 1 on page 1) an internal resistive-divider is activated and connected to the output. Therefore, the Power-OK

functionality can be realised with no additional external components.

The Power-OK feature is not active during shutdown. To obtain a logic-level output, connect a pull-up resistor from pin LBO to pin VOUT or VDD.

Larger values for this resistor will help to minimize current consumption; a 100kΩ resistor is perfect for most applications (see Figure 18 on page

11).

For the circuit shown in the left of Figure 18 on page 11, the input bias current into LBI is very low, permitting large-value resistor-divider networks

while maintaining accuracy. Place the resistor-divider network as close to the device as possible. Use a defined resistor for R2 and then calculate

R1 as:

Where:

VLBI (the internal sense reference voltage) is 1.2V.

In case of the LBI pin is connected to GND, an internal resistor-divider network is activated and compares the output voltage with a 92.5%

voltage threshold (see AS1346 - Typical Application Diagram with POK Function on page 1). For this particular Power-OK application, no

external resistive components (R1 and R2) are necessary.

(EQ 1)

R1R2VIN

VLBI

----------- 1–

⎝⎠

⎛⎞

⋅=

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 11 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Detailed Description

Figure 18. Typical Application Diagram with Adjustable Battery Monitoring

8.5 Thermal Shutdown

Due to its high-efficiency design, the AS1346 will not dissipate much heat in most applications. However, in applications where the AS1346 is

running at high ambient temperature, uses a low supply voltage, and runs with high duty cycles (such as in dropout) the heat dissipated may

exceed the maximum junction temperature of the device.

As soon as the junction temperature reaches approximately 150ºC the AS1346 goes in thermal shutdown. In this mode the internal PMOS &

NMOS switch are turned off. The device will power up again, as soon as the temperature falls below +140ºC again.

AS1346

COUT1

CIN

VIN

4.5V to 5.5V

VOUT1

3.3V 1200mA

SW1

COUT2

VOUT2

1.8V 500mA

FB1

FB2

SW2

AGND

EN2

PVIN

VDD

EN1

LBI

LBO

L1 = 3.3µH

L2 = 3.3µH

PVIN

PGND

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 12 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Application Information

9 Application Information

9.1 Component Selection

Only three power components are required to complete the design of the buck converter. For the adjustable LBI two external resistors are

needed.

9.2 Inductor Selection

For the external inductor, a 3.3µH inductor is recommended. Minimum inductor size is dependant on the desired efficiency and output current.

Inductors with low core losses and small DCR at 2MHz are recommended.

Calculation of IMAX:

9.3 Capacitor Selection

A 10µF capacitor is recommended for CIN as well as a 10µF for COUT. Small-sized X5R or X7R ceramic capacitors are recommended as they

retain capacitance over wide ranges of voltages and temperatures.

9.3.1 Input and Output Capacitor Selection

Low ESR input capacitors reduce input switching noise and reduce the peak current drawn from the battery. Also low ESR capacitors should be

used to minimize VOUT ripple. Multi-layer ceramic capacitors are recommended since they have extremely low ESR and are available in small

footprints.

For input decoupling the ceramic capacitor should be located as close to the device as practical. A 22µF input capacitor is sufficient for most

applications. Larger values may be used without limitations.

A 2.2µF to 10µF output ceramic capacitor is sufficient for most applications. Larger values up to 22µF may be used to obtain extremely low

output voltage ripple and improve transient response.

Table 5. Recommended Inductor

LDCR Current Rating

3.3µH 80mΩIMAX

Table 6. Recommended Input and Output Capacitor

CTC Code Rated Voltage

CIN 10 - 47µF X5R 6.3V

COUT1, COUT2 2.2 - 10µF X7R 25V

(EQ 2)

IMAX IOUT1VOUT1

×IOUT2VOUT2

×+

07,VIN

----------------------------------------------------------------------------------

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 13 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Package Drawings and Markings

10 Package Drawings and Markings

Figure 19. 12-Pi n TDFN 3x3mm Marking

Table 7. Packaging Code YYWWQZZ

YY WW QZZ

last two digits of the current year manufacturing week plant identifier free choice / traceability code

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 14 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Package Drawings and Markings

Figure 20. 12-Pi n TDFN 3x3mm Package

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 15 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet - Ordering Information

11 Ordering Information

The device is available as the standard products listed below.

Receive samples within 2 weeks for any non standard output voltage variant!

Note: All products are RoHS compliant.

Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect

Technical Support is found at http://www.austriamicrosystems.com/Technical-Support

For further information and requests, please contact us mailto:sales@austriamicrosystems.com

or find your local distributor at http://www.austriamicrosystems.com/distributor

Table 8. Ordering Information

Ordering Code Marking Channel Vout Iout Description Delivery Form Package

AS1346-BTDT3318 ASSL

OUT1 3.3V 1.2A Dual Step-Down

Converter with Battery

Monitoring

Tape and Reel 12-Pin TDFN

3x3mm

OUT2 1.8V 0.5A

AS1347-BTDTxxyy1

1. Non-standard devices from 1.2V to 3.6V are available in 100mV steps.

For more information and inquiries contact http://www.austriamicrosystems.com/contact

tbd

OUT1 xx 0.5A Dual Step-Down

Converter with Battery

Monitoring

Tape and Reel 12-Pin TDFN

3x3mm

OUT2 yy 0.5A

AS1348-BTDTxxyy1tbd

OUT1 xx 0.5A Dual Step-Down

Converter with Battery

Monitoring

Tape and Reel 12-Pin TDFN

3x3mm

OUT2 yy 0.95A

AS1349-BTDTxxyy1tbd

OUT1 xx 1.2A Dual Step-Down

Converter with Battery

Monitoring

Tape and Reel 12-Pin TDFN

3x3mm

OUT2 yy 1.2A

www.austriamicrosystems.com/DC-DC_Step-Down/AS1346 Revision 1.04 16 - 16

AS1346, AS1347, AS1348, AS1349

Datasheet

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Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale.

austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding

the freedom of the described devices from patent infringement. austriamicrosystems 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 austriamicrosystems AG for

current information. This product is intended for use in normal 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 austriamicrosystems AG for each application. For shipments of less than 100

parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location.

The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems 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

austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters

austriamicrosystems AG

Tobelbaderstrasse 30

A-8141 Unterpremstaetten, Austria

Tel: +43 (0) 3136 500 0

Fax: +43 (0) 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:

http://www.austriamicrosystems.com/contact