2
LT3750
3750fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum V
CC
● 2.8 3 V
Minimum V
TRANS
● 2.5 3 V
V
CC
Quiescent Current Not Switching, CHARGE = 5V 1.6 2.5 mA
Not Switching, CHARGE = 0V 1 µA
V
TRANS
Quiescent Current Not Switching, CHARGE = 5V 140 250 µA
Not Switching, CHARGE = 0V 1 µA
CHARGE Pin Current CHARGE = 24V 24 µA
CHARGE = 5V 19 µA
CHARGE = 0V 1 µA
CHARGE Pin Enable Voltage ● 0.87 1.1 V
CHARGE Pin Disable Voltage ● 0.2 0.6 V
Minimum CHARGE Pin Low Time High→Low→High 20 µs
V
OUT
Comparator Trip Voltage Measured RBG Pin ● 1.215 1.24 1.265 V
V
OUT
Comparator Overdrive 1µs Pulse Width, Measured on RBG Pin 30 mV
RBG Pin Bias Current RBG = 1.2V 70 500 nA
DCM Comparator Trip Voltage Measured as V
DRAIN
– V
TRANS
, R
DCM
= 43k (Note 3) ● 53680 mV
Current Limit Comparator Trip Voltage ● 68 78 88 mV
DONE Output Signal High 100kΩ to 5V 4.9 5 V
DONE Output Signal Low 100kΩ to 5V 0.1 0.2 V
DONE Pin Leakage Current DONE = 2.5V 0.2 µA
NMOS Minimum On Time 0.6 µs
GATE Rise Time 50 ns
GATE High Voltage C
GATE
= 1nF, V
CC
= 5V 3 3.8 4.5 V
C
GATE
= 1nF, V
CC
= 24V 22 22.6 23.5 V
GATE Turn Off Propagation Delay C
GATE
= 1nF 100 ns
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
V
CC
, V
TRANS
, GATE, DONE, CHARGE ...................... 24V
RBG ....................................................................... 1.5V
SOURCE ................................................................... 1V
Current into RDCM Pin ........................................ ±1mA
Current into RV
OUT
Pin ........................................ ±1mA
Current into DONE Pin ......................................... ±1mA
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
(Note 1)
LT3750EMS
ORDER PART NUMBER MS PART MARKING
LTBQD
T
JMAX
= 125°C, θ
JA
= 120°C/ W
1
2
3
4
5
V
TRANS
DONE
CHARGE
V
CC
GND
10
9
8
7
6
RBG
RV
OUT
RDCM
GATE
SOURCE
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are T
A
= 25°C. V
CC
= V
TRANS
= 5V unless otherwise specified.
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3750E 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: Refer to Block Diagram for V
DRAIN
definition.
