900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LT1615 Datasheet

Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter

No Preview Available !

FEATURES
s Low Quiescent Current:
20µA in Active Mode
<1µA in Shutdown Mode
s Operates with VIN as Low as 1V
s Low VCESAT Switch: 250mV at 300mA
s Tiny 5-Lead SOT-23 Package
s Uses Small Surface Mount Components
s High Output Voltage: Up to 34V
U
APPLICATIO S
s LCD Bias
s Handheld Computers
s Battery Backup
s Digital Cameras
LT1615/LT1615-1
Micropower Step-Up
DC/DC Converters
in SOT-23
DESCRIPTIO
The LT®1615/LT1615-1 are micropower step-up DC/DC
converters in a 5-lead SOT-23 package. The LT1615 is
designed for higher power systems with a 350mA current
limit and an input voltage range of 1.2V to 15V, whereas
the LT1615-1 is intended for lower power and single-cell
applications with a 100mA current limit and an extended
input voltage range of 1V to 15V. Otherwise, the two
devices are functionally equivalent. Both devices feature a
quiescent current of only 20µA at no load, which further
reduces to 0.5µA in shutdown. A current limited, fixed off-
time control scheme conserves operating current, result-
ing in high efficiency over a broad range of load current.
The 36V switch allows high voltage outputs up to 34V to
be easily generated in a simple boost topology without the
use of costly transformers. The LT1615’s low off-time of
400ns 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.
TYPICAL APPLICATIO
1-Cell Li-Ion to 20V Converter for LCD Bias
VIN
2.5V TO 4.2V
L1
10µH
D1
C1
4.7µF
VIN SW
LT1615
SHDN
FB
GND
C1: TAIYO YUDEN LMK316BJ475
C2: TAIYO YUDEN TMK316BJ105
D1: MOTOROLA MBR0530
L1: MURATA LQH3C100K24
R1
2M
R2
130k
20V
12mA
C2
1µF
1615/-1 TA01
Efficiency
85
80
VIN = 4.2V
75
70 VIN = 2.5V
VIN = 3.3V
65
60
55
50
0.1
0.3 1 3 10 30
LOAD CURRENT (mA)
1615/-1 TA01a
1


Linear Technology Electronic Components Datasheet

LT1615 Datasheet

Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter

No Preview Available !

LT1615/LT1615-1
ABSOLUTE AXI U RATI GS
(Note 1)
VIN, SHDN Voltage ................................................... 15V
SW Voltage .............................................................. 36V
FB Voltage .................................................................VIN
Current into FB Pin ................................................. 1mA
Junction Temperature ........................................... 125°C
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
ORDER PART
NUMBER
SW 1 5 VIN LT1615ES5
GND 2 LT1615ES5-1
FB 3 4 SHDN
S5 PACKAGE
5-LEAD PLASTIC SOT-23
TJMAX = 125°C, θJA = 256°C/W
S5 PART MARKING
LTIZ
LTKH
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 1.2V, VSHDN = 1.2V unless otherwise noted.
PARAMETER
CONDITIONS
Minimum Input Voltage
LT1615-1
LT1615
Quiescent Current
FB Comparator Trip Point
Not Switching
VSHDN = 0V
FB Comparator Hysteresis
Output Voltage Line Regulation
FB Pin Bias Current (Note 3)
Switch Off Time
Switch VCESAT
Switch Current Limit
1.2V < VIN < 12V
VFB = 1.23V
VFB > 1V
VFB < 0.6V
ISW = 70mA (LT1615-1)
ISW = 300mA (LT1615)
LT1615-1
LT1615
SHDN Pin Current
SHDN Input Voltage High
VSHDN = 1.2V
VSHDN = 5V
SHDN Input Voltage Low
Switch Leakage Current
Switch Off, VSW = 5V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1615 and LT1615-1 are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the
– 40°C to 85°C operating temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 3: Bias current flows into the FB pin.
MIN TYP MAX UNITS
1.0 V
1.2 V
20 30
1
µA
µA
q 1.205 1.23 1.255
V
8 mV
0.05 0.1
%/V
q
30 80
nA
400 ns
1.5 µs
85 120
250 350
mV
mV
75 100 125
300 350 400
mA
mA
23
8 12
µA
µA
0.9 V
0.25 V
0.01 5
µA
2


Part Number LT1615
Description Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
Maker Linear Technology
PDF Download

LT1615 Datasheet PDF






Similar Datasheet

1 LT1610 Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
Linear Technology
2 LT1611 Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
Linear Technology
3 LT1612 Step-Down 800kHz PWM DC/DC Converter
Linear Technology
4 LT1613 Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
Linear Technology
5 LT1614 Inverting 600kHz Switching Regulator
Linear Technology
6 LT1615 Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
Linear Technology
7 LT1615-1 Micropower Step-Up DC/DC Convertersin SOT-23
Linear Technology
8 LT1616 1.4MHz Step-Down Switching Regulator
Linear Technology
9 LT1617 Micropower Inverting DC/DC Converters in SOT-23
Linear Technology





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy