LTC3459ES6#TRPBF Linear Technology, LTC3459ES6#TRPBF Datasheet

IC BOOST SYNC ADJ SOT23-6

LTC3459ES6#TRPBF

Manufacturer Part Number
LTC3459ES6#TRPBF
Description
IC BOOST SYNC ADJ SOT23-6
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LTC3459ES6#TRPBF

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
2.5 ~ 10 V
Voltage - Input
1.5 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-6, TSOT-6
Primary Input Voltage
5.5V
No. Of Outputs
1
Output Voltage
10V
Output Current
75mA
No. Of Pins
6
Operating Temperature Range
-40°C To +85°C
Msl
MSL 1 - Unlimited
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Power - Output
-
Frequency - Switching
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC3459ES6#TRPBFLTC3459ES6
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC3459ES6#TRPBFLTC3459ES6
Manufacturer:
LT
Quantity:
20 000
Company:
Part Number:
LTC3459ES6#TRPBFLTC3459ES6#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC3459ES6#TRPBFLTC3459ES6#TRMPBF
Manufacturer:
LD
Quantity:
20 000
Company:
Part Number:
LTC3459ES6#TRPBF
Manufacturer:
LT/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
TYPICAL APPLICATION
5V
Small Solution Size
>85% Effi ciency over Wide Load Range
Internal Synchronous Rectifi er
V
5V at 30mA from 3.3V Input
3.3V at 20mA from 2 AA Cell Input
Programmable Output Voltages Up to 10V
Burst Mode
Inrush Current Limiting
Output Disconnect in Shutdown
Ultralow Quiescent (10μA) and Shutdown (<1μA)
Currents
Low Profi le 2mm × 2mm DFN, 2mm × 3mm DFN or
SOT-23 Package
General Purpose Micropower Boost
Digital Cameras
PDAs
LCD Bias
Small OLED Displays
Supercap Charging
IN
1μF
Range: 1.5V to 5.5V
OFF ON
®
22μH
Operation
5V to 8V Converter
V
SHDN
IN
LTC3459
GND
SW
V
OUT
FB
2M
365k
47pF
3459 TA01a
4.7μF
V
8V
30mA
OUT
Synchronous Boost Converter
DESCRIPTION
The LTC
boost converter intended for low power, size constrained
portable applications. The LTC3459 can be powered from
a single lithium ion battery, a 2- to 3-cell stack of alkaline
or nickel batteries, or any low impedance voltage source
between 1.5V and 5.5V. The output is programmable via
an external divider between 2.5V and 10V. Although the
part is primarily intended for boost applications, V
maintain regulation below V
The LTC3459 offers Burst Mode operation with a fi xed
peak current, providing high conversion effi ciency over
a wide range of load currents. During start-up, inductor
current is controlled preventing the inrush surge current
found in many boost converters. In shutdown the output
is disconnected from the input and quiescent current is
reduced to <1μA.
The LTC3459 is offered in low profi le 6-pin 2mm × 2mm
DFN, 2mm × 3mm DFN or SOT-23 (ThinSOT
allowing a tiny footprint for the total solution.
Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
®
3459 is a low current, high effi ciency synchronous
100
90
80
70
60
50
0.01
V
V
IN
OUT
= 5V
= 8V
10V Micropower
0.1
Effi ciency
I
LOAD
IN
1
(at reduced effi ciency).
(mA)
10
LTC3459
3459 TA01b
TM
100
) packages,
OUT
3459fc
1
will

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LTC3459ES6#TRPBF Summary of contents

Page 1

... The LTC3459 is offered in low profi le 6-pin 2mm × 2mm DFN, 2mm × 3mm DFN or SOT-23 (ThinSOT allowing a tiny footprint for the total solution. , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...

Page 2

... LTC3459EDC#TRPBF LTC3459EDCB#PBF LTC3459EDCB#TRPBF LTC3459ES6#PBF LTC3459ES6#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: 2 Storage Temperature Range .................. – ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER V IN Input Voltage Range V Quiescent Current IN V Shutdown Current IN V OUT Programmable Voltage Range V Quiescent Supply Current OUT V Shutdown Current OUT Reference Feedback ...

Page 4

LTC3459 TYPICAL PERFORMANCE CHARACTERISTICS Minimum OUT IN 4000 V = 10V OUT V = 7.5V OUT 3500 OUT V = 3.3V OUT 3000 L = 22μH 2500 2000 1500 1000 500 0 1.5 2 ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS V AC Ripple OUT V OUT 50mV/DIV INDUCTOR CURRENT 50mA/DIV V = 3.3V 5μs/DIV 3459 G10 OUT L = 22μ 4.7μF OUT C = 47pF FF V Regulated Below OUT V ...

Page 6

LTC3459 PIN FUNCTIONS (DC/DCB/S6 Packages) V (Pin 1/Pin 6/Pin 6): Input Supply Pin. Bypass low ESR, ESL ceramic capacitor of at least 1μ (Pin 2/Pin 2/Pin 5): Regulated Output Voltage of OUT the Boost Regulator. ...

Page 7

OPERATION Operation The LTC3459 synchronous boost converter utilizes a Burst Mode control technique to achieve high effi ciency over a wide dynamic range. A 2.5% accurate comparator is used to monitor the output voltage (V above the comparator threshold, no ...

Page 8

LTC3459 OPERATION This is accomplished by varying the t proximately 1/(V – Due to propagation delays OUT IN and a 0.6μA bias current in the timer, the t more accurately predicted as follows: APPLICATIONS INFORMATION Inductor Selection An ...

Page 9

TYPICAL APPLICATIONS Very low operating quiescent current and synchronous operation allow for greater than 85% conversion effi ciency in many applications. Lower output voltages will result in lower effi ciencies since the N- and P-channel R will increase. The switching ...

Page 10

LTC3459 TYPICAL APPLICATIONS controlled, preventing any damaging effects of inrush current. Proper heat sinking of the package is required in this application as the die may dissipate 100mW to 200mW during initial charging. When V OUT normal boost mode operation ...

Page 11

... DIMENSIONS ARE INCLUSIVE OF PLATING 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. DCB Package 6-Lead Plastic DFN (2mm × ...

Page 12

... I < 1μA, MS10 OUT(MAX 5.25V 12μA, I < 1μA, OUT(MAX 5V 20μA/300μA, I < 1μA, ThinSOT OUT(MAX 5V 20μA/300μA, I < 1μA, ThinSOT OUT(MAX 34V 25μA, I < 1μA, ThinSOT OUT(MAX 1208 REV C • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2007 3459fc ...

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