LTC3429 LINER [Linear Technology], LTC3429 Datasheet
LTC3429
Manufacturer Part Number
LTC3429
Description
600mA, 500kHz Micropower Synchronous Boost Converter with Output Disconnect
Manufacturer
LINER [Linear Technology]
Datasheet
1.LTC3429.pdf
(12 pages)
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC3429BES6
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC3429BES6
Manufacturer:
LT/凌特
Quantity:
20 000
Company:
Part Number:
LTC3429BES6#TR
Manufacturer:
LT
Quantity:
520
Part Number:
LTC3429BES6#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC3429ES6
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC3429ES6#TRPBF
Manufacturer:
LT/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
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APPLICATIO S
■
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Up to 96% Efficiency
True Output Load Disconnect
Inrush Current Limiting and Internal Soft-Start
Low Voltage Start-Up: 0.85V
Automatic Burst Mode
Continuous Switching at Light Loads (LTC3429B)
Internal Synchronous Rectifier
Current Mode Control with Internal Compensation
Short-Circuit Protection
500kHz Fixed Frequency Switching
Input Range: 0.5V to 4.4V
Output Range: 2.5V to 4.3V (Up to 5V with Schottky)
Shutdown Current: <1µA
Antiringing Control Minimizes EMI
Tiny External Components
Low Profile (1mm) SOT-23 Package
MP3 Players
Digital Cameras
LCD Bias Supplies
Handheld Instruments
Wireless Handsets
GPS Receivers
+
Figure 1. 2-Cell to 3.3V Synchronous Boost Converter
2-CELL
AA
U
4.7µF
OFF ON
®
Operation with I
4.7µH
V
SHDN
IN
LTC3429
GND
SW
U
V
OUT
FB
1.02M
604k
Q
~ 20µA
3429 F01a
10µF
V
3.3V
250mA
OUT
Synchronous Boost Converter
600mA, 500kHz Micropower
DESCRIPTIO
The LTC
nous, fixed frequency, step-up DC/DC converters with true
output load disconnect, inrush current limiting and soft-
start in a low profile 6-lead ThinSOT
devices are capable of supplying 100mA from a single AA
cell input or 250mA from a 2-cell AA with a 3.3V output.
A switching frequency of 500kHz minimizes overall solu-
tion footprint by allowing the use of tiny, low profile
inductors and ceramic capacitors. Current mode PWM
control with internal compensation reduces external parts
count thereby saving critical board real estate. The LTC3429
shifts automatically to power saving Burst Mode operation
at light loads while the LTC3429B features continuous
switching at light loads. Antiringing control circuitry re-
duces EMI concerns by damping the inductor in discon-
tinuous mode.
The devices also feature low shutdown current of under
1µA. The true output disconnect feature allows the output
to be completely discharged in shutdown. It also limits the
inrush of current during start-up, minimizing surge cur-
rents seen by the input supply.
trademarks are the property of their respective owners. Burst Mode is a registered
trademark of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology
Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
with Output Disconnect
®
3429/LTC3429B are high efficiency synchro-
100
90
80
70
60
50
40
0.1
LTC3429/LTC3429B
EFFICIENCY
U
2-Cell to 3.3V Efficiency
1
OUTPUT CURRENT (mA)
10
V
POWER LOSS
V
IN
IN
V
= 2.4V
IN
= 2.4V
TM
= 3V
100
package. These
V
IN
= 3V
3429 F01b
1000
100
10
1
0.1
0.01
0.001
0.0001
3429fa
1
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