LT1618EDD Linear Technology, LT1618EDD Datasheet

IC CONV DC/DC STEPUP CC/CV 10DFN

LT1618EDD

Manufacturer Part Number
LT1618EDD
Description
IC CONV DC/DC STEPUP CC/CV 10DFN
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LT1618EDD

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
1.26 ~ 36 V
Current - Output
1.5A
Frequency - Switching
1.4MHz
Voltage - Input
1.6 ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-DFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-

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Part Number
Manufacturer
Quantity
Price
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LT1618EDD
Manufacturer:
LT
Quantity:
10 000
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LT1618EDD
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LINEAR/凌特
Quantity:
20 000
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Manufacturer:
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Part Number:
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Manufacturer:
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FEATURES
APPLICATIO S
TYPICAL APPLICATIO
Accurate Input/Output Current Control: ±5% Over
Temperature
Accurate Output Voltage Control: ±1%
Wide V
1.4MHz Switching Frequency
High Output Voltage: Up to 35V
Low V
Available in (3mm × 3mm × 0.8mm) 10-Pin DFN and
10-Pin MSOP Packages
LED Backlight Drivers
USB Powered Boost/SEPIC Converters
Input Current Limited Boost/SEPIC Converters
Battery Chargers
100mA 500mA
0V
OFF ON
0V
CESAT
IN
3.3V
3.3V
4.7µF
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN EMK316BJ475
D1: ON SEMICONDUCTOR MBR0520
L1: SUMIDA CR43-100
Range: 1.6V to 18V
V
5V
C1
IN
(with Selectable 100mA/500mA Input Current Limit)
Switch: 200mV at 1A
U
20k
USB to 12V Boost Converter
0.1Ω
8
9
3
13k
SHDN
I
ISP
V
ISN
ADJ
IN
4
2
U
LT1618
10µH
GND
L1
5
SW
V
FB
C
7
10
2k
10nF
1
D1
R1
909k
R2
107k
1618 TA01a
DESCRIPTIO
Step-Up DC/DC Converter
V
12V
C2
4.7µF
The LT
tional voltage feedback loop and a unique current feedback
loop to operate as a constant-current, constant-voltage
source. This fixed frequency, current mode switcher oper-
ates from a wide input voltage range of 1.6V to 18V, and
the high switching frequency of 1.4MHz permits the use of
tiny, low profile inductors and capacitors. The current
sense voltage is set at 50mV and can be adjusted using the
I
Available in the 10-Pin (3mm × 3mm) Exposed Pad DFN
and 10-pin MSOP packages, the LT1618 provides a com-
plete solution for constant-current applications.
OUT
ADJ
Constant-Voltage 1.4MHz
, LTC and LT are registered trademarks of Linear Technology Corporation.
pin.
®
1618 step-up DC/DC converter combines a tradi-
90
85
80
75
70
65
60
0
Constant-Current/
U
20
40
Efficiency Curve
LOAD CURRENT (mA)
60
80
100
120 140 160
LT1618
1618 TA01b
sn1618 1618fas
1

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LT1618EDD Summary of contents

Page 1

... I pin. ADJ Available in the 10-Pin (3mm × 3mm) Exposed Pad DFN and 10-pin MSOP packages, the LT1618 provides a com- plete solution for constant-current applications. , LTC and LT are registered trademarks of Linear Technology Corporation OUT 12V 7 ...

Page 2

... Operating Temperature Range (Note 2) .. – 40°C to 85°C Storage Temperature Range MSOP ............................................... – 65°C to 150°C DFN ................................................. – 65°C to 125°C Lead Temperature (Soldering, 10 sec) (MSOP) .... 300° ORDER PART NUMBER TOP VIEW FB 1 LT1618EDD ISN 2 ISP ADJ GND 5 DD PART MS PACKAGE ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER Switch V CESAT Switch Leakage Current SHDN Pin Current Shutdown Threshold (SHDN Pin) Start-Up Threshold (SHDN Pin) Note 1: Absolute Maximum Ratings are those values beyond which the life of ...

Page 4

LT1618 W U TYPICAL PERFOR A CE CHARACTERISTICS Switching Frequency 1.8 1.7 1.6 1 18V IN 1 1.6V IN 1.3 1.2 1.1 1.0 – 50 – 100 125 TEMPERATURE (°C) 1618 ...

Page 5

W BLOCK DIAGRA SHDN DRIVER GND U OPERATIO The LT1618 uses a constant frequency, current mode control scheme to provide excellent line and load regula- tion. Operation can ...

Page 6

LT1618 U U APPLICATIONS INFORMATION Inductor Selection Several inductors that work well with the LT1618 are listed in Table 1, although there are many other manufacturers and devices that can be used. Consult each manufacturer for more detailed information and ...

Page 7

U U APPLICATIONS INFORMATION Setting Output Voltage To set the output voltage, select the values of R1 and R2 (see Figure 1) according to the following equation. ⎛ ⎞ V OUT – ⎜ ⎟ ...

Page 8

LT1618 U U APPLICATIONS INFORMATION When sensing input current, the sense resistor should be placed in front of the inductor (between the decoupling capacitor and the inductor) as shown in the circuits in the Typical Applications section. This will regulate ...

Page 9

U TYPICAL APPLICATIO S 4.5W Direct Broadcast Satellite (DBS) Power Supply with Short-Circuit Protection L1 33µH 0.068Ω 12V 2 ISN SW 3 ISP LT1618 SHDN I V GND ADJ ...

Page 10

LT1618 U TYPICAL APPLICATIONS 1. 10kHz TO 50kHz PWM BRIGHTNESS ADJUST C1: TAIYO YUDEN JMK212BJ475 C2: TAIYO YUDEN EMK316BJ105 D1: ON SEMICONDUCTOR MBR0520 L1: SUMIDA CLQ4D10-4R7 V 1. 2-Cell White LED Driver L1 4.7µH D1 ...

Page 11

U TYPICAL APPLICATIONS 2. 10kHz TO 50kHz PWM BRIGHTNESS ADJUST C1: TAIYO YUDEN JMK212BJ475 C2: TAIYO YUDEN TMK316BJ105 D1: ON SEMICONDUCTOR MBR0530 L1: SUMIDA CLQ4D10-100 4.7µF 10kHz TO 50kHz PWM BRIGHTNESS ADJUST ...

Page 12

LT1618 U TYPICAL APPLICATIONS USB to 5V SEPIC Converter L1 I 10µH IN 0.1Ω ISN C1 3 4.7µF ISP LT1618 3.3V 9 SHDN OFF GND ADJ 20k ...

Page 13

U TYPICAL APPLICATIO S 12V Boost Converter with 500mA Input Current Limit L1 I 10µH L1 0.1Ω 1. ISN 3 ISP LT1618 SHDN I GND ADJ 4.7µF C1: ...

Page 14

LT1618 PACKAGE DESCRIPTIO 3.50 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 0.25 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF Package 10-Lead Plastic DFN (3mm × 3mm) (Reference ...

Page 15

... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 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 16

... Constant Current, 1.2MHz/2.7MHz, High Efficiency White LED Boost Regulator with Integrated Schottky Diode LT3467/LT3467A 1. 1.3MHz/2.1MHz, High Efficiency Step-Up DC/DC SW Converter with Integrated Soft-Start ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

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