AS1336 austriamicrosystems, AS1336 Datasheet

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AS1336

Manufacturer Part Number
AS1336
Description
Dual, Low Voltage, Micropower Dc-dc Step-up Converters
Manufacturer
austriamicrosystems
Datasheet
Data sheet
A S 1 3 3 6
D u a l , L o w Vo l ta g e , M i c r o p o w e r D C - D C St e p - U p C o n v e r t e r s
1 General Description
The AS1336 is a dual synchronous, fixed frequency,
very high-efficiency DC-DC boost converter capable of
supplying guaranteed 75mA at 3.3V on each output
from a 0.8V supply only. Compact size and minimum
external parts requirements make this device perfect for
modern portable devices.
High-speed switching frequency (1.2MHz) and internally
compensated PWM current mode design provide highly-
reliable DC-DC conversion, especially when driving
white LEDs. MODE pins allow to enable automatic pow-
ersave mode for each regulator independently.
The AS1336 can supervise the battery voltage and gen-
erate a low battery error flag. A hysteresis ensures valid
operation especially during start-up and end of life.
The device contains two internal MOSFET switches:
one NMOS switch and one PMOS synchronous rectifier.
Anti-ringing control circuitry reduces EMI by damping
the inductor in discontinuous mode, and the device
exhibits extremely low current (< 2µA) in shutdown.
The AS1336A offers shutdown disconnect while in the
AS1336B the battery is connected directly to the output
during shutdown enabling the supply of real-time-clocks.
The AS1336 is available in a TQFN 3x3mm 16-pin pack-
age.
www.austriamicrosystems.com/DC-DC_Step-Up/AS1336
Figure 1. Typical Application Diagram – Single Cell to 1.8V & 3.3V Synchronous Boost Converter
AA Battery
10µF
C
IN
R
R
1
2
On
Off
On
Off
L1 / L2
10µH
GND
VIN
LX1
LX2
EN1
EN2
LBI
11
15
13
1
8
4
7
2
GND
AS1336
Revision 1.01
14
2 Key Features
3 Applications
The AS1336 is ideal for low-power applications where
ultra-small size is critical as in medical diagnostic equip-
ment, mice, pagers, digital cameras, remote wireless
transmitters, MP3 players, LCD bias supplies, cordless
phones, GPS receivers, and PC cards.
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PGND
96% Efficiency
Operating Voltage from 0.8V to 3.6V
Output Range: 1.8V to 3.6V
Delivers 145mA @ 3.3V (from 1.5V)
Low Start-Up Voltage: 0.8V
High-Speed Fixed-Frequency: 1.2MHz
Internal PMOS Synchronous Rectifier
Automatic Powersave Operation
Anti-Ringing Control Minimizes EMI
Logic Controlled Shutdown (< 2µA)
TQFN 3x3mm 16-pin Package
16
VOUT1
3
FB1
5
MODE1
10
LBO
6
MODE2
12
VOUT2
9
FB2
180kΩ
560kΩ
120kΩ
150kΩ
C
C
10µF
10µF
OUT1
OUT2
145mA
260mA
V
V
3.3V
1.8V
OUT1
OUT2
1 - 18

Related parts for AS1336

AS1336 Summary of contents

Page 1

... The AS1336A offers shutdown disconnect while in the AS1336B the battery is connected directly to the output during shutdown enabling the supply of real-time-clocks. The AS1336 is available in a TQFN 3x3mm 16-pin pack- age. Figure 1. Typical Application Diagram – Single Cell to 1.8V & 3.3V Synchronous Boost Converter AA Battery ...

Page 2

... VIN 11 12 VOUT2 www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 GND 1 12 VOUT2 GND 2 11 VIN AS1336 FB1 3 LBO 10 PGND EN1 4 17 FB2 Description Signal Ground. These pins are used as a ground reference. Feedback Pin. Feedback input to the g divider tap to this pin. The output voltage can be adjusted from 1.8V to 3.6V by ...

Page 3

... VOUT1 PGND 17 www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 Description Switch Pin 2. Connect an inductor between this pin and V trace lengths as short and wide as is practical to reduce EMI and voltage overshoot. If the inductor current falls to zero, or pin EN is low, an internal 100Ω anti-ringing switch is connected from this pin to V ...

Page 4

... Table 2. Absolute Maximum Ratings Parameter All Pins to GND Operating Temperature Range Storage Temperature Range Latch-Up ESD Package Body Temperature www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 may cause permanent damage to the device. These are stress ratings only, Min Max Units -0 -40 +85 º ...

Page 5

... QPWS OUT 2. Guaranteed by design and verified in lab characterisation. Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 = -40°C to +85ºC, Typ values @ T AMB AMB Conditions ...

Page 6

... Input Voltage (V) Figure 7. Efficiency vs. Output Current, V 100 0 Output Current (mA) www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 = C = 10µ +25ºC (unless otherwise specified); AMB OUT1 OUT2 = 1.8V Figure 4. Efficiency vs. Input Voltage, V OUT 100 Iout = 0.1mA Iout = 1mA 40 Iout = 10mA ...

Page 7

... Output Current (mA) Figure 13. Efficiency vs Mode, V OUT 100 Aut omat ic Powersave 50 Fixed Frequency 40 aut omat ic Powersave, Vout2 Output Current (mA) www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 = 3.0V Figure 10. Efficiency vs. Output Current, V OUT 100 Vin = 0.8V 50 Vin = 1.2V Vin = 1.5V 40 Vin = 2.0V Vin = 2.5V 30 100 1000 0 ...

Page 8

... Figure 17. Startup Voltage vs. Output Current 2 1.75 1.5 1.25 1 0.75 0 Output Current (mA) Figure 19. Input Current vs. Input Voltage 10 Vout 1 = 3.3V, Vout2 = of f Vout 1 = Vout2 = 3.3V 1 0.1 0.01 0.8 1.3 1.8 2.3 Input Voltage (V) www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 Figure 16. I max vs. V OUT 800 700 600 500 400 300 200 100 0 0.9 1.3 Figure 18. V vs. V OUT 3.5 3.25 3 2.75 2.5 2. ...

Page 9

... Datasheet - Figure 21. Startup Voltage 1mA OUT 200µs/Div Figure 23. Coil Voltage 1mA OUT 100ns/Div Figure 25. Load Transient 100ns/Div www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 Figure 22. Shutdown Voltage, I OUT 10ms/Div Figure 24. Coil Voltage 100mA OUT 200ns/Div Revision 1.01 = 1mA ...

Page 10

... Datasheet - Detailed Description The AS1336 is a dual synchronous boost converter and can operate from a single-cell input voltage (V and features fixed frequency (1.2MHz) and current mode PWM control for exceptional line- and load-regulation. With ...

Page 11

... The frequency of this intermittent PWM is proportional to load current; i.e., as the load current drops further below the powersave threshold, the AS1336 turns on less frequently. When the load current increases above the powersave threshold, the AS1336 will resume continuous, seamless PWM operation. ...

Page 12

... Both boost converters can be enabled independently from the other. EN1 will enable boost converter 1 and EN2 enables boost converter 2. When pin EN1 or EN2 is low the AS1336 the corresponding boost converter is switched off and <1µA current is drawn from battery; when pin EN1 or EN2 is high the corresponding device is switched on driven from a logic-level output, the logic high-level (on) should be referenced to V Shutdown mode: The AS1336A disconnects the output completly from the input ...

Page 13

... Along with Figure 1 on page 1, Figure 27 converters are perfectly suited. Figure 27. AS1336 - Dual Boost Converter, Single AA Cell to 1.8V & 3.3V adjustable Output Voltage AA Battery VIN C IN 10µ LX1 10µ ...

Page 14

... Datasheet - External Component Selection Inductor Selection The fast switching frequency (1.2MHz) of the AS1336 allows for the use of small surface mount or chip inductor for the external inductor (see Figure 26 on page 3.3µ ...

Page 15

... OUT1 C OUT2 JMK212BJ226MG-T PCB Layout Guidelines The high-speed operation of the AS1336 requires proper layout for optimum performance. A large ground pin copper area will help to lower the device temperature multi-layer board with a separate ground plane is recommended. ! Traces carrying large currents should be direct. ...

Page 16

... Dimension b applies to metallized terminal and is measured between 0.15 and 0.30mm from terminal tip refers to the maximum number of terminals on D side. 7. Unilateral coplanarity zone applies to the exposed heat sink slug as well as the terminals. www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 Symbol Max Notes D BSC 0 ...

Page 17

... ASSM Converters; Battery Disconnect in shutdown Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 Table 6. Descriptiom http://www.austriamicrosystems.com/ICdirect mailto:sales@austriamicrosystems.com http://www ...

Page 18

... 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 www.austriamicrosystems.com/DC-DC_Step-Up/AS1336 Revision 1. ...

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