Datasheet

LTC1772B
2
1772bfa
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (V
IN
) .........................–0.3V to 10V
SENSE
–
, PGATE Voltages ...............–0.3V to (V
IN
+ 0.3V)
V
FB
, I
TH
/RUN Voltages............................... –0.3V to 2.4V
PGATE Peak Output Current (< 10µs) ........................ 1A
Storage Ambient Temperature Range.....– 65°C to 150°C
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature (Note 3) ............................ 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
I
TH
/RUN 1
GND 2
V
FB
3
6 PGATE
5 V
IN
4 SENSE
–
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C, θ
JA
= 230°C/W
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1772BES6#PBF LTC1772BES6#TRPBF LTVU 6-Lead Plastic TSOT Package –40°C to 85°C
LTC1772BIS6#PBF LTC1772BIS6#TRPBF LTVU 6-Lead Plastic TSOT Package –40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1772BES6 LTC1772BES6#TR LTVU 6-Lead Plastic TSOT Package –40°C to 85°C
LTC1772BIS6 LTC1772BIS6#TR LTVU 6-Lead Plastic TSOT Package –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input DC Supply Current
Normal Operation
Shutdown
UVLO
Typicals at V
IN
= 4.2V (Note 4)
2.4V ≤ V
IN
≤ 9.8V, PGATE Logic High
2.4V ≤ V
IN
≤ 9.8V, V
ITH
/RUN = 0V
V
IN
< UVLO Threshold
270
8
6
420
22
10
μA
μA
μA
Undervoltage Lockout Threshold V
IN
Falling
V
IN
Rising
l
1.55
1.85
2.00
2.10
2.35
2.40
V
V
Shutdown Threshold (at I
TH
/RUN)
l
0.15 0.35 0.55 V
Start-Up Current Source V
ITH
/RUN = 0V 0.25 0.5 0.85 μA
Regulated Feedback Voltage 0°C to 70°C (Note 5)
–40°C to 85°C (Note 5)
l
l
0.780
0.770
0.800
0.800
0.820
0.830
V
V
Output Voltage Line Regulation 2.4V ≤ V
IN
≤ 9.8V (Note 5) 0.05 mV/V
Output Voltage Load Regulation I
TH
/RUN Sinking 5μA (Note 5)
I
TH
/RUN Sourcing 5μA (Note 5)
2.5
2.5
mV/μA
mV/μA
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 4.2V unless otherwise specifi ed. (Note 2)