LT3463EDD#TRPBF Linear Technology, LT3463EDD#TRPBF Datasheet

IC CONV DC/DC DUAL MICRPWR 10DFN

LT3463EDD#TRPBF

Manufacturer Part Number
LT3463EDD#TRPBF
Description
IC CONV DC/DC DUAL MICRPWR 10DFN
Manufacturer
Linear Technology
Type
Invertingr
Datasheet

Specifications of LT3463EDD#TRPBF

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
2
Voltage - Output
1.25 ~ 40 V
Current - Output
250mA
Voltage - Input
2.4 ~ 15 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Frequency - Switching
-

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
TO 5V
2.7V
V
CCD Bias
LCD Bias
Handheld Computers
Digital Cameras
Generates Well-Regulated Positive and
Negative Outputs
Low Quiescent Current:
Internal 42V Power Switches
Internal 42V Schottky Diodes
Low V
Input Voltage Range: 2.4V to 15V
High Output Voltages: Up to 40V
Low Profile (0.8mm) 3mm x 3mm DFN Package
IN
4.7 F
20 A (per Converter) in Active Mode
<1 A in Shutdown Mode
CESAT
Switch: 180mV at 150mA
CCD Bias Supply (15V, –8V)
SHDN1
SHDN2
GND
V
10 H
IN
U
10 H
LT3463A
SW2
SW1
1 F
V
OUT1
V
FB1
FB2
D2
REF
U
1M
90.9k
154k
1M
4.7 F
10pF
3463 TA01a
2.2 F
V
–8V
50mA
V
15V
10mA
OUT1
OUT2
DESCRIPTIO
The LT
verters with internal Schottky diodes in a 10-lead 3mm
3mm DFN package. Negative and positive LT3463 con-
verters have a 250mA current limit. The LT3463A positive
converter also has a 250mA limit, while the negative
converter has a 400mA limit. Both devices have an input
voltage range of 2.4V to 15V, making them ideal for a wide
variety of applications. Each converter features a quies-
cent current of only 20 A, which drops to under 1 A in
shutdown. A current limited, fixed off-time control scheme
conserves operating current, resulting in high efficiency
over a broad range of load current. The 42V switch enables
high voltage outputs up to 40V to be easily generated
without the use of costly transformers. The low 300ns off-
time permits the use of tiny, low profile inductors and
capacitors to minimize footprint and cost in space-con-
scious portable applications.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
3463/LT3463A are dual micropower DC/DC con-
80
75
70
65
60
55
50
with Schottky Diodes
0.1
DC/DC Converters
Efficiency and Power Loss
15V EFFICIENCY
Dual Micropower
U
LOAD CURRENT (mA)
1
–8V EFFICIENCY
LT3463/LT3463A
15V LOSS
10
–8V LOSS
V
IN
3463 TA01b
= 3.6V
100
240
200
160
120
80
40
0
1
3463f

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LT3463EDD#TRPBF Summary of contents

Page 1

... The low 300ns off- time permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-con- scious portable applications. , LTC and LT are registered trademarks of Linear Technology Corporation OUT1 15V ...

Page 2

LT3463/LT3463A ABSOLUTE AXI U RATI GS (Note SHDN1, SHDN2 Voltage ................................... 15V IN SW1, SW2, V Voltage ....................................... 42V OUT1 D2 Voltage ............................................................. –42V FB1, FB2 Voltage Range .............................. –0. Junction Temperature ...

Page 3

W U TYPICAL PERFOR A CE CHARACTERISTICS V and V Voltage CESAT DIODE 900 FOR BOTH SWITCHERS 800 I = 150mA 700 DIODE 600 500 400 300 200 I = 150mA SWITCH 100 0 –50 – ...

Page 4

LT3463/LT3463A CTIO S SHDN1 (Pin 9): Shutdown Pin for Switcher 1. Pull this pin above 1.5V to enable Switcher 1. Pull below 0.3V to turn it off. Do not leave this pin floating. FB1 (Pin ...

Page 5

U U APPLICATIO S I FOR ATIO Choosing an Inductor Several recommended inductors that work well with the LT3463 are listed in Table 1, although there are many other manufacturers and devices that can be used. Consult each manufacturer for ...

Page 6

LT3463/LT3463A U U APPLICATIO S I FOR ATIO output voltages from a high input voltage source will often exceed the 50V maximum switch rating. For instance, a 12V to – 40V converter using the inverting topology would generate 52V on ...

Page 7

... MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 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. ...

Page 8

... C2 2 10pF V OUT2 –8V C3 50mA 4.7 F 3463 TA01a Typical Waveforms for –8V Output 2 s/DIV 3463 TA05 : 34V <1 A, OUT(MAX 34V <1 A, OUT(MAX 34V <1 A, OUT(MAX 34V <1 A, OUT(MAX 34V <1 A, OUT(MAX LT/TP 0404 1K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2003 3463f ...

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