ltc3525esc6-5-trpbf Linear Technology Corporation, ltc3525esc6-5-trpbf Datasheet

no-image

ltc3525esc6-5-trpbf

Manufacturer Part Number
ltc3525esc6-5-trpbf
Description
400ma Micropower Synchronous Step-up Dc/dc Converter With Output Disconnect
Manufacturer
Linear Technology Corporation
Datasheet
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
1V to 1.6V
V
Up to 95% Effi ciency
Output Disconnect and Inrush Current Limit
Fixed Output Voltages of 3V, 3.3V or 5V
Delivers 65mA at 3V from a 1V Input
Delivers 60mA at 3.3V from a 1V Input,
or 140mA at 3.3V from a 1.8V Input
Delivers 175mA at 5V from a 3V Input
Burst Mode
Only Three External Components
V
<1µA Shutdown Current
Antiringing Control
Short-Circuit and Overtemperature Protection
Very Low Profi le of 1mm
Tiny 6-Pin SC70 Package
MP3 Players
Portable Instruments
Glucose Meters
Digital Cameras
IN
IN
> V
OUT
OFF ON
1µF
Operation
®
Operation: I
U
*MURATA LQH32CN100K53
V
SHDN
GND
IN
Q
LTC3525-3.3
= 7µA
10µH
L1*
U
V
GND
OUT
SW
3525 TA01
Converter with Output Disconnect
10µF
V
3.3V
60mA
OUT
Synchronous Step-Up DC/DC
DESCRIPTIO
The LTC
fi ciency synchronous step-up DC/DC converters with
output disconnect that can start up with an input as low
as 1V. They offer a compact, high effi ciency alternative to
charge pumps in single cell or dual cell alkaline or Li-ion
applications. Only three small external components are
required. The LTC3525 is offered in fi xed output voltages
of 3V, 3.3V or 5V.
The device includes a 0.5Ω N-channel MOSFET switch
and a 0.8Ω P-channel synchronous rectifi er. Peak switch
current ranges from 150mA to 400mA, depending on
load, providing enhanced effi ciency. Quiescent current
is an ultralow 7µA, maximizing battery life in portable
applications.
Other features include <1µA shutdown current, anti-
ringing control and thermal shutdown. The LTC3525 is
available in a tiny 6-pin SC70 package.
Burst Mode is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Patents Pending
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC3525-3.3/LTC3525-5
®
3525-3/LTC3525-3.3/LTC3525-5 are high ef-
100
90
80
70
60
50
40
30
20
0.01
LTC3525-3.3 Effi ciency and Power
400mA Micropower
0.1
EFFICIENCY
Loss vs Load Current
U
LOAD (mA)
1
POWER LOSS
10
LTC3525-3/
V
V
V
100
IN
IN
IN
LT3525 • TA02
= 3V
= 2.4V
= 1.2V
1000
100
10
1
0.1
0.01
3525fa
1

Related parts for ltc3525esc6-5-trpbf

ltc3525esc6-5-trpbf Summary of contents

Page 1

... Other features include <1µA shutdown current, anti- ringing control and thermal shutdown. The LTC3525 is available in a tiny 6-pin SC70 package. , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...

Page 2

... JA ORDER PART NUMBER LTC3525ESC6-3 LTC3525ESC6-3.3 LTC3525ESC6-5 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. (LTC3525-3) ...

Page 3

ELECTRICAL CHARACTERISTICS The denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T ● 1.2V 1.2V 3.3V unless otherwise noted. ⎯ S ⎯ H ⎯ D ...

Page 4

LTC3525-3/ LTC3525-3.3/LTC3525 TYPICAL PERFOR A CE CHARACTERISTICS Maximum Output Current (for V to Drop 2.5%) OUT 300 LTC3525-3.3 250 200 LTC3525-3 LTC3525-5 150 100 50 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS LTC3525-5 Load Regulation 2 2.4V IN 2.0 1.5 1.0 0 22µF 0 OUT –0.5 –1 10µF OUT –1.5 –2.0 –2 100 120 ...

Page 6

LTC3525-3/ LTC3525-3.3/LTC3525 TYPICAL PERFOR A CE CHARACTERISTICS LTC3525-3.3 Output Voltage Ripple I = OUT 5mA I = OUT 40mA I = OUT 80mA 50µs/DIV 22µF OUT LTC3525-5 Output Voltage Ripple I = ...

Page 7

CTIO S ⎯ S ⎯ H ⎯ D ⎯ N (Pin 1): Logic Controlled Shutdown Input. Con- nect to a voltage >1V to enable the LTC3525. Connect to a voltage <0.4V to disable the LTC3525. ...

Page 8

LTC3525-3/ LTC3525-3.3/LTC3525-5 U OPERATIO The LTC3525 is a high performance Burst Mode operation only, synchronous boost converter requiring only three small external components. Its simplicity and small size make it a high effi ciency alternative to charge pump designs. It ...

Page 9

U OPERATIO INDUCTOR CURRENT 100mA/DIV CURRENT 50mA/DIV Figure 1. Inductor Current Changing as a Function of Load full load using the minimum recommended 10µF output capacitor for the LTC3525-3.3 and a 22µF capacitor for the LTC3525-5 (due to the capacitor’s ...

Page 10

LTC3525-3/ LTC3525-3.3/LTC3525-5 U OPERATIO Component Selection Inductor values between 4.7µH and 15µH are recom- mended. In most applications 10µH will yield the best compromise between size and effi ciency. The inductor should be a low-loss ferrite design and must be ...

Page 11

... EIAJ PACKAGE REFERENCE IS EIAJ SC-70 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC3525-3.3/LTC3525-5 Single Alkaline or NiMH to 3.3V Converter with 1mm Profi ...

Page 12

... LTC3459 60mA, 10V Micro Power Synchronous Boost Converter LT3464 85mA (I ), High Effi ciency Step-Up DC/DC Converter SW with Integrated Schottky and PNP Disconnect ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

Related keywords