Datasheet

2
LT1616
(Note 1)
Input Voltage (V
IN
) ................................................. 25V
BOOST Pin Voltage ................................................. 35V
BOOST Pin Above SW Pin ...................................... 25V
SHDN Pin ............................................................... 25V
FB Voltage ................................................................ 6V
Current Into FB Pin ...............................................±1mA
Operating Temperature Range (Note 2) .. –40°C to 85°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
T
JMAX
= 125°C, θ
JA
= 250°C/ W
ORDER PART
NUMBER
S6 PART MARKING
LT1616ES6
LTNB
PARAMETER CONDITIONS MIN TYP MAX UNITS
Undervoltage Lockout 3.35 3.6 V
Feedback Voltage ● 1.225 1.25 1.275 V
FB Pin Bias Current V
FB
= Measured V
REF
+ 10mV ● 150 600 nA
Quiescent Current Not Switching 1.9 2.5 mA
Quiescent Current in Shutdown V
SHDN
= 0V 0.01 2 µA
Reference Line Regulation V
IN
= 5V to 25V 0.005 %/V
Switching Frequency V
FB
= 1.1V ● 1 1.4 1.8 MHz
Frequency Shift Threshold on FB Pin f
SW
= 700kHz 0.44 V
Maximum Duty Cycle ● 80 87 %
Switch Current Limit (Note 3) 630 850 mA
Switch V
CESAT
I
SW
= 300mA 220 350 mV
Switch Leakage Current 10 µA
Minimum Boost Voltage Above Switch I
SW
= 300mA 1.6 2.5 V
BOOST Pin Current I
SW
= 300mA 7 12 mA
SHDN Input Voltage High 1.8 V
SHDN Input Voltage Low 0.4 V
SHDN Bias Current V
SHDN
= 3V 8 15 µA
V
SHDN
= 0V 0.01 0.1 µA
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
IN
= 10V, V
BOOST
= 15V, unless otherwise noted. (Note 2)
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
BOOST 1
GND 2
FB 3
6 SW
5 V
IN
4 SHDN
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC SOT-23
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LT1616E is 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: Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at higher duty cycle.
Consult factory for parts specified with wider operating temperature ranges.
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