LTC3525D-3.3 - 400mA Micropower Synchronous Step-Up DC/DC Converter with Pass Through Mode
Datasheet Documentation
Datasheet
Reliability Data
cad_symbol
Overview

Features

Typical Application

LTC3525D-3.3 Typical Application
LTC3525D-3.3 Typical Application

Description

The LTC®3525D-3.3 is a high efficiency synchronous stepup DC/DC converter that can start up with an input as low as 0.85V. It offers a compact, high efficiency alternative to charge pumps in single cell or dual cell alkaline or Li-Ion applications. Only three small external components are required. The LTC3525D features a fixed output voltage of 3.3V. In shutdown, VOUT is connected to VIN through the inductor.

The device includes a 0.5Ω N-channel MOSFET switch and a 0.8Ω P-channel synchronous rectifier. Peak switch current ranges from 150mA to 400mA, depending on load, providing enhanced efficiency. Quiescent current is an ultralow 7μA, maximizing battery life in portable applications.

Other features include anti-ringing control and thermal shutdown. The LTC3525D is available in a tiny 6-Lead SC70 package.

List of LTC3525 Options
PART NAME INPUT START-UP VOLTAGE OUTPUT VOLTAGE VOUT STATUS IN SHUTDOWN MODE
LTC3525-3 0.85V 3V Output Disconnect
LTC3525-3.3 0.85V 3.3V Output Disconnect
LTC3525-5 0.85V 5V Output Disconnect
LTC3525D-3.3 0.85V 3.3V Pass Through Mode
LTC3525L-3 0.7V 3V Output Disconnect
Packaging

SC-70

LTC3525D-3.3 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LTC3525DESC6-3.3#TRMPBF SC70 6 E $2.57 $1.86
LTC3525DESC6-3.3#TRPBF SC70 6 E $2.57 $1.81
LTC3525ESC6-3#TRMPBF SC70 6 E $2.57 $1.83
LTC3525ESC6-3#TRPBF SC70 6 E $2.57 $1.81
LTC3525ESC6-3.3#TRMPBF SC70 6 E $2.57 $1.83
LTC3525ESC6-3.3#TRPBF SC70 6 E $2.57 $1.81
LTC3525ESC6-5#PBF SC70 6 E $2.57
LTC3525ESC6-5#TRMPBF SC70 6 E $2.57 $1.83
LTC3525ESC6-5#TRPBF SC70 6 E $2.57 $1.81
LTC3525LESC6-3#TRMPBF SC70 6 E $2.71 $1.95
LTC3525LESC6-3#TRPBF SC70 6 E $2.71 $1.90
LTC3525ISC6-5#TRMPBF SC70 6 I $2.86 $2.00
LTC3525ISC6-3#TRMPBF SC70 6 I $2.86 $2.00
LTC3525ISC6-3#TRPBF SC70 6 I $2.86 $2.00
LTC3525ISC6-5#PBF SC70 6 I $2.86
LTC3525DISC6-3.3#TRMPBF SC70 6 I $2.86 $2.05
LTC3525ISC6-3#PBF SC70 6 I $2.86
LTC3525DISC6-3.3#PBF SC70 6 I $2.86
LTC3525DISC6-3.3#TRPBF SC70 6 I $2.86 $2.00
LTC3525ISC6-3.3#TRPBF SC70 6 I $2.86 $2.00
LTC3525ISC6-3.3#PBF SC70 6 I $2.86
LTC3525ISC6-5#TRPBF SC70 6 I $2.86 $2.00
LTC3525ISC6-3.3#TRMPBF SC70 6 I $2.86 $2.00
LTC3525ESC6-3.3 SOT 6 E $5.14
LTC3525ESC6-3.3#TR SC70 6 E $5.14 $3.62
LTC3525ESC6-5#TR SC70 6 E $5.14 $3.62
LTC3525ESC6-3 SC70 6 E $5.14
LTC3525ESC6-3#TR SC70 6 E $5.14 $3.62
LTC3525DESC6-3.3#TR SC70 6 E $5.14 $3.62
LTC3525ESC6-3#TRM SC70 6 E $5.14 $3.66
LTC3525ESC6-3.3#TRM SC70 6 E $5.14 $3.66
LTC3525ESC6-5#TRM SC70 6 E $5.14 $3.66
LTC3525DESC6-3.3#TRM SC70 6 E $5.14 $3.72
LTC3525ISC6-3 SC70 6 I $5.72
LTC3525ISC6-3#TR SC70 6 I $5.72 $4.00
LTC3525ISC6-3.3#TR SC70 6 I $5.72 $4.00
LTC3525ISC6-5#TR SC70 6 I $5.72 $4.00
LTC3525DISC6-3.3#TR SC70 6 I $5.72 $4.00
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.


Part Number Description Price Documentation
DC879A-A LTC3525-3.3 Demo Board | Micropower Synchronous Step-Up, 1V to 3.2VIN, 3.3VOUT @ 140mA $75.00