LT1935ES5#TRMPBF Linear Technology, LT1935ES5#TRMPBF Datasheet

IC MULTI CONFIG ADJ 2A TSOT23-5

LT1935ES5#TRMPBF

Manufacturer Part Number
LT1935ES5#TRMPBF
Description
IC MULTI CONFIG ADJ 2A TSOT23-5
Manufacturer
Linear Technology
Type
Step-Up (Boost), Flyback, Sepicr
Datasheet

Specifications of LT1935ES5#TRMPBF

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
1.27 ~ 38 V
Current - Output
2A
Frequency - Switching
1.2MHz
Voltage - Input
2.3 ~ 16 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-5, TSOT-5, TSOP-5
Primary Input Voltage
16V
No. Of Outputs
1
Output Voltage
38V
Output Current
2A
No. Of Pins
5
Operating Temperature Range
-40°C To +85°C
Msl
MSL 1 - Unlimited
Rohs Compliant
Yes
Dc To Dc Converter Type
Step Up
Pin Count
5
Input Voltage
16V
Switching Freq
1400KHz
Package Type
TSOT-23
Output Type
Adjustable
Switching Regulator
Yes
Line Regulation
0.01%/V
Mounting
Surface Mount
Input Voltage (min)
2.3V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Compliant
Other names
LT1935ES5#PBF
LT1935ES5#PBF
LT1935ES5#TRMPBF
LT1935ES5#TRMPBFTR

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Manufacturer
Quantity
Price
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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
1.2MHz Switching Frequency
High Output Voltage: Up to 38V
Wide Input Range: 2.3V to 16V
Low V
Soft-Start
Uses Small Surface Mount Components
5V at 1A from 3.3V Input
12V at 600mA from 5V Input
Low Shutdown Current: < 1µA
Pin-for-Pin Compatible with the LT1613 and LT1930
Low Profile (1mm) SOT-23 (ThinSOT
Digital Cameras
Battery Backup
LCD Bias
Local 5V or 12V Supply
PC Cards
xDSL Power Supply
TFT-LCD Bias Supply
V
5V
Figure 1. 5V to 12V, 600mA Step-Up DC/DC Converter
IN
CESAT
D1: ON SEMI MBRM120
L1: SUMIDA CDRH5D28-4R2
ON OFF
4.7µF
Switch: 180mV at 2A
SHDN
U
V
IN
LT1935
4.2µH
GND
L1
SW
FB
D1
U
10k
84.5k
TM
) Package
1935 F01
10µF
V
12V
600mA
OUT
DESCRIPTIO
ThinSOT is a trademark of Linear Technology Corporation.
The LT
switching regulator. Its unprecedented 2A, 40V internal
switch allows high output currents to be generated in a
small footprint. Intended for space-conscious applica-
tions, the LT1935 switches at 1.2MHz, allowing the use of
tiny, low profile inductors and capacitors 2mm or less in
height. The NPN switch achieves a V
at 2A independent of supply voltage, resulting in high
efficiency even at maximum power levels from a 3V input.
A constant frequency, internally compensated, current
mode PWM architecture results in low, predictable output
noise that is easy to filter. Low ESR ceramic capacitors can
be used on the output, further reducing noise to the
millivolt level. The high voltage switch on the LT1935 is
rated at 40V, making the device ideal for boost converters
up to 38V as well as for single-ended primary inductance
converter (SEPIC) and flyback designs. The device can
generate 5V at up to 1A from a 3.3V supply or 5V at 550mA
from four alkaline cells in a SEPIC design.
The LT1935 is available in a 5-lead SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1935 is the industry’s highest power SOT-23
1.2MHz Boost DC/DC
Converter in ThinSOT
90
85
80
75
70
65
60
55
50
0
U
100
Efficiency, V
with 2A Switch
200
LOAD CURRENT (mA)
300
V
IN
400
OUT
= 3.3V
CESAT
V
= 12V
IN
500
= 5V
600
of just 180mV
1935 F01b
LT1935
700
1
1935f

Related parts for LT1935ES5#TRMPBF

LT1935ES5#TRMPBF Summary of contents

Page 1

... The device can generate from a 3.3V supply 550mA from four alkaline cells in a SEPIC design. The LT1935 is available in a 5-lead SOT-23 package. , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. V OUT ...

Page 2

LT1935 ABSOLUTE AXI U RATI GS (Note 1) V Voltage .............................................................. 16V IN SW Voltage ................................................– 0.4V to 40V FB Voltage ................................................................. 6V Current Into FB Pin .............................................. ±1mA SHDN Voltage ......................................................... 16V Maximum Junction Temperature ......................... ...

Page 3

W U TYPICAL PERFOR A CE CHARACTERISTICS FB Pin Voltage 1.28 1.27 1.26 1.25 1.24 –50 – 100 125 TEMPERATURE (°C) 1935 G01 Current Limit 25° TYP MIN ...

Page 4

LT1935 CTIO S SW (Pin 1): Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI. GND (Pin 2): Ground. Tie directly to local ground plane. FB (Pin 3): Feedback Pin. ...

Page 5

U U APPLICATIONS INFORMATION Inductor Selection Use inductors that are intended for high frequency power applications. The saturation current rating should be at least 2A. The RMS current rating, which is usually based on heating of the inductor, should be ...

Page 6

LT1935 U U APPLICATIONS INFORMATION V OUT 100mV/DIV I LOAD 200mA/DIV 50µs/DIV 84.5k 68pF FB 10k Figure 5. Transient Response with a 68pF Phase-Lead Capacitor RUN 5V/DIV V OUT 2V/DIV I IN 1A/DIV SHDN RUN Figure 6. Adding a Resistor ...

Page 7

... DRAWING NOT TO SCALE 3. 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. D1 ...

Page 8

... OUT(MAX <1µA, MS Package 0.5V to 4.5V 5.25V 12µA, IN OUT(MAX <1µA, QFN Package 25V 34V 0.9mA, IN OUT(MAX <6µA, TSSOP-16E Package 2.6V to 16V 40V 1.2mA, IN OUT(MAX <1µA, ThinSOT Package SD LT/TP 0604 1K • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2004 1935f ...

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