Datasheet

LT3469
2
3469f
V
IN
Voltage ............................................................. 16V
SW Voltage ............................................................. 40V
V
CC
Voltage............................................................. 38V
+IN, –IN Voltage ..................................................... 10V
FB Voltage ................................................................ 3V
Current Into SW Pin ................................................. 1A
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
ORDER PART
NUMBER
(Note 1)
ABSOLUTE AXI U RATI GS
WWWU
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LT3469ETS8
T
JMAX
= 125°C, θ
JA
= 250°C/W
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2) V
IN
= 5V, V
CC
= 35V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
TS8 PART MARKING
LTACA
OUT 1
FB 2
V
IN
3
GND 4
8 –IN
7 +IN
6 V
CC
5 SW
TOP VIEW
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
PARAMETER CONDITIONS MIN TYP MAX UNITS
g
m
Amplifier
Input Offset Voltage V
OUT
= V
CC
/2 ● 310 mV
Input Offset Current ● 10 100 nA
Input Bias Current ● 150 500 nA
Input Resistance—Differential Mode 1MΩ
Input Resistance—Common Mode 200 MΩ
Common Mode Rejection Ratio V
CM
= 0V to 10V 70 100 dB
Power Supply Rejection Ratio—V
IN
V
IN
= 2.5V to 16V 80 120 dB
Power Supply Rejection Ratio—V
CC
V
CC
= 15V to 35V 65 85 dB
Gain No Load, V
OUT
= 2V to 33V 15 30 V/mV
R
L
= 200k, V
OUT
= 2V to 33V 10 20 V/mV
Transconductance I
OUT
= ±100µA 160 220 260 µA/mV
● 140 300 µA/mV
Maximum Output Current V
OUT
= V
CC
/2 ±30 ±40 ±55 mA
● ±23 ±58 mA
Maximum Output Voltage, Sourcing V
CC
= 35V, I
OUT
= 10mA 34.0 34.5 V
V
CC
= 35V, I
OUT
= 0mA 34.5 34.9 V
Minimum Output Voltage, Sinking I
OUT
= –10mA 200 1000 mV
I
OUT
= 0mA 10 500 mV
Output Resistance V
CC
= 35V, V
OUT
= 2V to 33V 100 kΩ
Supply Current—V
CC
V
CC
= 35V 1.5 2 2.5 mA
Switching Regulator
Minimum Operating Voltage 2.5 V
Maximum Operating Voltage 16 V
Feedback Voltage ● 1.19 1.23 1.265 V
FB Pin Bias Current ● 45 200 nA
FB Line Regulation 2.5V < V
IN
< 16V 0.03 %/V
Supply Current—V
IN
1.9 2.6 mA
Switching Frequency ● 0.8 1.3 1.7 MHz
Maximum Duty Cycle ● 88 91 %
Switch Current Limit (Note 3) ● 165 220 mA
Switch V
CESAT
I
SW
= 100mA 350 500 mV
PACKAGE/ORDER I FOR ATIO
UU
W