Datasheet

LTC3114-1
3
Rev. C
For more information www.analog.com
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3114MPFE-1#PBF LTC3114MPFE-1#TRPBF 3114FE-1 16-Lead Plastic TSSOP –55°C to 150°C
AUTOMOTIVE PRODUCTS**
LTC3114EDHC-1#WPBF LTC3114EDHC-1#WTRPBF 31141 16-Lead (5mm × 3mm) Plastic DFN –40°C to 125°C
LTC3114IDHC-1#WPBF LTC3114IDHC-1#WTRPBF 31141 16-Lead (5mm × 3mm) Plastic DFN –40°C to 125°C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
**Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These
models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your
local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for
thesemodels.
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 24V, V
OUT
= 5V, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage V
LDO
≥ 2.7V, –55°C to 0°C
V
LDO
≥ 2.7V, 0°C to 150°C
l
l
2.3
2.2
40
40
V
V
Output Operating V
oltage (Note 5)
l
2.7 40 V
Undervoltage Lockout Threshold on LDO V
LDO
Rising
l
2.3 2.5 2.7 V
V
IN
Quiescent Current in Shutdown 3 µA
V
IN
Quiescent Current in Burst Mode Operation FB = 1.4V, Non-Bootstrapped (Note 6) 50 µA
Oscillator Frequency
l
1000 1200 1400 kHz
Oscillator Frequency Variation V
IN
= 12V to 36V 0.1 %/V
Feedback Voltage Measured on FB
l
0.98 1.0 1.02 V
Feedback Voltage Line Regulation V
IN
= 2.7V to 40V, Measured on FB 0.2 %
Error Amplifier Transconductance VC Current = ±5µA 120 µS
FB Pin Input Current FB = 1V 1 50 nA
VC Source Current VC = 0.6V –12 µA
VC Sink Current VC = 0.6V 12 µA
RUN Pin Threshold—Accurate RUN Pin Rising
l
1.185 1.205 1.29 V
RUN Pin Hysteresis 140 mV
Run Pin Threshold—Logic
l
0.3 0.7 1.1 V
PROG Current Switch D Current = 1A
Switch D Current = 500mA
Switch D Current = 100mA (Note 3)
38
18
2
40
20
4
42
22
6
µA
µA
µA
PROG Current Gain Ratio of PROG Current to SWD Current 40 µA/A
PROG V
oltage Threshold 0.90 0.925 0.95 V
Inductor Current Limit (Note 3)
l
1.3 1.7 2.3 A
Overload Current Limit V
OUT
= 0V (Note 3) 2.6 A
I
ZERO
Inductor Current Limit (Note 3) 100 mA
Maximum Duty Cycle Percentage of Period SW2 is Low in Boost Mode
Percentage of Period SW1 is High in Boost Mode
l
l
90
85
95
88
%
%
Minimum Duty Cycle Per
centage of Period SW1 is High in Buck Mode
l
0 %
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