ltc3400es6-1 Linear Technology Corporation, ltc3400es6-1 Datasheet

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ltc3400es6-1

Manufacturer Part Number
ltc3400es6-1
Description
600ma, 1.2mhz Micropower Synchronous Boost Converter In Thinsot
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Up to 92% Efficiency
Generates 3.3V at 100mA from a Single AA Cell
Low Start-Up Voltage: 0.85V
V
Internal Synchronous Rectifier
2.5V to 5V Output Range
Automatic Burst Mode
Logic Controlled Shutdown (< 1µA)
Antiringing Control Minimizes EMI
Tiny External Components
Low Profile (1mm) SOT-23 Package
Pagers
MP3 Players
Digital Cameras
LCD Bias Supplies
Handheld Instruments
Wireless Handsets
GPS Receivers
OUT
+
Connected to V
SINGLE
AA CELL
Single Cell to 3.3V Synchronous Boost Converter
U
4.7µF
OFF ON
IN
®
in Shutdown
Operation
4.7µH
V
SHDN
LTC3400-1
IN
GND
SW
U
V
OUT
FB
1.02M
1%
604k
1%
34001 F01
4.7µF
V
3.3V
100mA
OUT
Synchronous Boost Converter
600mA, 1.2MHz Micropower
DESCRIPTIO
The LTC
up DC/DC converter delivering high efficiency in a 6-lead
ThinSOT™ package. Capable of supplying 3.3V at 100mA
from a single AA cell input, the device contains an internal
NMOS switch and PMOS synchronous rectifier.
A switching frequency of 1.2MHz minimizes solution
footprint by allowing the use of tiny, low profile inductors
and ceramic capacitors. The current mode PWM design is
internally compensated, reducing external parts count.
The LTC3400-1 features automatic shifting to power sav-
ing Burst Mode operation at light loads. In shutdown, V
and V
used for backup power. The LTC3400-1 features low
shutdown current of under 1µA.
The LTC3400-1 is offered in the low profile (1mm)
SOT-23 package.
ThinSOT is a trademark of Linear Technology Corporation.
US Patent Numbers 5,481,178; 6,580,258; 6,304,066; 6,127,815; 6,498,466; 6,611,131.
, LTC, LT and Burst Mode are registered trademarks of Linear Technology Corporation.
IN
are connected, which allows the input battery to be
®
3400-1 is a synchronous, fixed frequency, step-
100
90
80
70
60
50
40
0.1
FIGURE 1 CIRCUIT
WITH OPTIONAL SCHOTTKY DIODE
(SEE APPLICATIONS INFORMATION)
U
1
LOAD CURRENT (mA)
V
IN
Efficiency
= 2.4V
10
V
IN
LTC3400-1
in ThinSOT
= 1.5V
100
34001 F01a
1000
34001f
1
OUT

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ltc3400es6-1 Summary of contents

Page 1

... The LTC3400-1 features low shutdown current of under 1µA. The LTC3400-1 is offered in the low profile (1mm) SOT-23 package. , LTC, LT and Burst Mode are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. US Patent Numbers 5,481,178; 6,580,258; 6,304,066; 6,127,815; 6,498,466; 6,611,131. V OUT 3 ...

Page 2

... Note 5: Burst Mode operation get the equivalent input (battery) current. OUT ORDER PART NUMBER LTC3400ES6 OUT 4 SHDN S6 PART MARKING LTBJM = 102°C/W MIN TYP MAX 0.85 1 0.5 0.65 2 ...

Page 3

W U TYPICAL PERFOR A CE CHARACTERISTICS Output Load Burst Mode Threshold 4.7µ 25° 3. OUT OUT 10 0 0.9 1.5 2.1 2.7 3.3 3.9 4.5 ...

Page 4

LTC3400 CTIO S SW (Pin 1): Switch Pin. Connect inductor between SW and V . Optional Schottky diode is connected between IN SW and V . Keep these PCB trace lengths as short and OUT ...

Page 5

U OPERATIO The LTC3400-1 is a1.2MHz, synchronous boost converter housed in a 6-lead ThinSOT package. Able to operate from an input voltage below 1V, the device features fixed frequency, current mode PWM control for exceptional line and load regulation. With ...

Page 6

LTC3400-1 U OPERATIO above the burst threshold, the LTC3400-1 will resume continuous PWM operation seamlessly. Referring to the Block Diagram, an optional capacitor (C and FB in some circumstances can reduce the peak-to APPLICATIO S I FOR ATIO ...

Page 7

U U APPLICATIO S I FOR ATIO The inductor current ripple is typically set for 20% to 40% of the maximum inductor current (I ferrite core inductor materials reduce frequency depen- dent power losses compared to cheaper powdered iron types, ...

Page 8

LTC3400-1 U TYPICAL APPLICATIO S + SINGLE AA CELL OFF ON D1: PHILLIPS PMEG2010EA L1: SUMIDA CDRH2D18/HP-4R7 8 Single Cell to 3.3V Synchronous Boost Converter with Load Disconnect in Shutdown L1 D1 4.7µ 4.7µF SW Si2305DS 6 5 ...

Page 9

U TYPICAL APPLICATIO S + LITHIUM CELL D1: PHILIPS PMEG2010EA L1: SUMIDA CDRH2D18/HP-4R7 C1, C2: TAIYO YUDEN JMK212BJ475MG Single Lithium Cell to 5V, 250mA OPTIONAL 2Ω SNUBBER 1nF L1 D1 4.7µ 4.7µ ...

Page 10

LTC3400-1 U TYPICAL APPLICATIO S Single Cell AA Cell to ±3V Synchronous Boost Converter + SINGLE AA CELL D1, D2: ZETEX FMND7000 DUAL DIODE L1: SUMIDA CDRH2D18/HP-4R7 1µF 4.7µ 4.7µ ...

Page 11

... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U ...

Page 12

... OUT as Low as 1.1V 30mA from Single Cell IN = 20µA, 1µA Shutdown Current Low for Gate Drive CC = 2.6V to 16V 450mA from 3.3V Input IN as Low as 1.5V 12µA, QFN Package Q LT/TP 0604 1K • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2004 34001f ...

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