Datasheet

LTC3862-1
3
38621f
ORDER INFORMATION
(Notes 2, 3) 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
= 12V, RUN = 2V and SS = open, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Input and INTV
CC
Linear Regulator
V
IN
V
IN
Supply Voltage Range
l
8.5 36 V
I
VIN
V
IN
Supply Current
Normal Mode, No Switching
Shutdown
(Note 5)
V
RUN
= 0V
l
l
1.8
30
3.0
80
mA
µA
INTV
CC
LDO Regulator Output Voltage 9.5 10.0 10.5 V
dV
INTVCC(LINE)
Line Regulation 12V < V
IN
< 36V 0.002 0.02 %/V
dV
INTVCC(LOAD)
Load Regulation Load = 0mA to 20mA –2 %
V
UVLO
INTV
CC
UVLO Voltage Rising INTV
CC
Falling INTV
CC
7.5
7.0
V
V
3V8 LDO Regulator Output Voltage 3.8 V
Switcher Control Loop
V
FB
Reference Voltage V
ITH
= 0.8V (Note 6) E-Grade (Note 3)
I-Grade and H-Grade (Note 3)
l
l
1.210
1.199
1.223
1.223
1.235
1.248
V
V
dV
FB
/dV
IN
Feedback Voltage V
IN
Line Regulation V
IN
= 8.5V to 36V (Note 6) ±0.002 0.01 %/V
dV
FB
/dV
ITH
Feedback Voltage Load Regulation V
ITH
= 0.5V to 1.2V (Note 6) 0.01 0.1 %
g
m
Transconductance Amplifi er Gain V
ITH
= 0.8V (Note 6), ITH Pin Load = ±5µA 660 µMho
f
0dB
Error Amplifi er Unity-Gain Crossover
Frequency
(Note 7) 1.8 MHz
V
ITH
Error Amplifi er Maximum Output Voltage
(Internally Clamped)
V
FB
= 1V, No Load 2.7 V
Error Amplifi er Minimum Output Voltage V
FB
= 1.5V, No Load 50 mV
I
ITH
Error Amplifi er Output Source Current –30 µA
Error Amplifi er Output Sink Current 30 µA
I
FB
Error Amplifi er Input Bias Currents (Note 6) –50 –200 nA
V
ITH(PSKIP)
Pulse Skip Mode Operation ITH Pin Voltage Rising ITH Voltage (Note 6)
Hysteresis
0.275
25
V
mV
I
SENSE(ON)
SENSE Pin Current 0.01 2 µA
V
SENSE(MAX)
Maximum Current Sense Input Threshold V
SLOPE
= Float, Low Duty Cycle
(Note 3)
l
65
60
75
75
85
90
mV
mV
V
SENSE(MATCH)
CH1 to CH2 Maximum Current Sense
Threshold Matching
V
SLOPE
= Float, Low Duty Cycle (Note 3)
(V
SENSE1
– V
SENSE2
)
l
–10 10 mV
ELECTRICAL CHARACTERISTICS
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3862EUH-1#PBF LTC3862EUH-1#TRPBF 38621 24-Lead (5mm × 5mm) Plastic QFN –40°C to 85°C
LTC3862IUH-1#PBF LTC3862IUH-1#TRPBF 38621 24-Lead (5mm × 5mm) Plastic QFN –40°C to 125°C
LTC3862HUH-1#PBF LTC3862HUH-1#TRPBF 38621 24-Lead (5mm × 5mm) Plastic QFN –40°C to 150°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.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
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/