EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C,
θ
JA
= 165°C/W,
θ
JC
= 102°C/W
ORDER INFORMATION
LEAD FREE FINISH
LT3467EDDB#PBF
LT3467IDDB#PBF
LT3467AEDDB#PBF
LT3467AIDDB#PBF
LT3467IS6#PBF
LT3467ES6#PBF
LT3467AES6#PBF
LT3467AIS6#PBF
LEAD BASED FINISH
LT3467EDDB
LT3467IDDB
LT3467AEDDB
LT3467AIDDB
LT3467IS6
LT3467ES6
LT3467AES67
LT3467AIS67
TAPE AND REEL
LT3467EDDB#TRPBF
LT3467IDDB#TRPBF
LT3467AEDDB#TRPBF
LT3467AIDDB#TRPBF
LT3467IS6#TRPBF
LT3467ES6#TRPBF
LT3467AES6#TRPBF
LT3467AIS6#TRPBF
TAPE AND REEL
LT3467EDDB#TR
LT3467IDDB#TR
LT3467AEDDB#TR
LT3467AIDDB#TR
LT3467IS6#TR
LT3467ES6#TR
LT3467AES6#TR
LT3467AIS67#TR
PART MARKING*
LCPX
LCPX
LCKD
LCKD
LTACH
LTACH
LTBCC
LTBCC
PART MARKING*
LCPX
LCPX
LCKD
LCKD
LTACH
LTACH
LTBCC
LTBCC
PACKAGE DESCRIPTION
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
PACKAGE DESCRIPTION
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified 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 specifications, go to:
http://www.linear.com/tapeandreel/
3467afe
2
LT3467/LT3467A
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Operating Voltage
Maximum Operating Voltage
Feedback Voltage
FB Pin Bias Current
Quiescent Current
Quiescent Current in Shutdown
Reference Line Regulation
Switching Frequency
(Note 3)
V
SHDN
= 2.4V, Not Switching
V
SHDN
= 0.5V, V
IN
= 3V
2.6V ≤ V
IN
≤ 16V
LT3467
LT3467A
LT3467A
LT3467
LT3467
LT3467A
LT3467A
At Minimum Duty Cycle
At Maximum Duty Cycle (Note 4)
I
SW
= 1.1A
V
SW
= 5V
2.4
0.5
V
SHDN
= 3V
V
SHDN
= 0V
V
SS
= 0.5V
2
16
0
3
32
0.1
4.5
1
1.6
1.6
88
87
82
78
1.4
0.8
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3V, V
SHDN
= V
IN
unless otherwise noted. Specifications are for both
the LT3467 and LT3467A unless otherwise noted.
CONDITIONS
MIN
TYP
2.2
1.230
1.220
1.255
10
1.2
0.01
0.01
1.3
2.1
94
88
10
1.8
1.2
330
0.01
2.5
1.9
500
1
MAX
2.4
16
1.270
1.280
50
2
1
0.05
1.6
2.7
UNITS
V
V
V
V
nA
mA
μA
%/V
MHz
MHz
MHz
%
%
%
%
%
A
A
mV
μA
V
V
μA
μA
μA
l
l
l
Maximum Duty Cycle
Minimum Duty Cycle
Switch Current Limit
Switch V
CESAT
Switch Leakage Current
SHDN
Input Voltage High
SHDN
Input Voltage Low
SHDN
Pin Bias Current
SS Charging Current
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 LT3467E/LT3467AE are guaranteed to meet performance
specifications from 0°C to 85°C, junction temperature. Specifications over
the –40°C to 85°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LT3467I/LT3467AI are guaranteed over the full –40°C to 125°C
operating junction temperature range.
Note 3:
Current flows out of the pin.
Note 4:
See Typical Performance Characteristics for guaranteed current
limit vs duty cycle.
3467afe
3
LT3467/LT3467A
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current vs Temperature
1.6
1.4
1.2
I
SHDN
(μA)
1.0
I
Q
(mA)
0.8
0.6
0.4
0.2
0
–40 –25 –10 5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
3467 G01
FB Pin Voltage vs Temperature
1.26
1.25
1.24
V
FB
(V)
1.23
1.22
1.21
1.20
–40 –25 –10 5
140
120
100
80
60
40
20
0
SHDN
Current vs
SHDN
Voltage
T
A
= 25°C
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
3467 G02
0
2
4
6
10 12
V
SHDN
(V)
8
14
16
18
3467 G03
Current Limit vs Duty Cycle
2.0
1.8
1.6
1.4
I
LIM
(A)
1.2
1.0
0.8
0.6
0.4
0.2
0
10
20
30
40
50 60
DC (%)
70
80
90
GUARANTEED
V
CESAT
100mV/DIV
TYPICAL
T
A
= 25°C
Switch Saturation Voltage
vs Switch Current
2.50
2.25
OSCILLATOR FREQUENCY (MHz)
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
3467 G05
Oscillator Frequency
vs Temperature
LT3467A
T
A
= 25°C
T
A
= 85°C
LT3467
T
A
= –40°C
SW CURRENT 200mA/DIV
0
–50
–25
0
25
50
75
100
3467 G06
TEMPERATURE (°C)
3467 G04
Soft-Start Current
vs Soft-Start Voltage
6
5
SWITCH CURRENT (A)
4
I
SS
(μA)
3
2
1
0
T
A
= 25°C
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
50 100 150 200 250 300 350 400 450 500
V
SS
(mV)
3467 G07
Peak Switch Current
vs Soft-Start Voltage
T
A
= 25°C
V
SHDN
2V/DIV
Start-Up Waveform
(Figure 2 Circuit)
V
OUT
1V/DIV
I
SUPPLY
0.5A/DIV
0
50 100 150 200 250 300 350 400 450 500
V
SS
(mV)
3467 G08
0.5ms/DIV
3467 G09
3467afe
4
LT3467/LT3467A
PIN FUNCTIONS
(DFN/TSOT)
FB (Pin 1/Pin 3):
Feedback Pin. Reference voltage is 1.255V.
Connect resistive divider tap here. Minimize trace area at
FB. Set V
OUT
= 1.255V(1 + R1/R2).
GND (Pins 2, 5, 9/Pin 2):
Ground. Tie directly to local
ground plane.
SW (Pins 3, 4/Pin 1):
Switch Pin. (Collector of internal
NPN power switch) Connect inductor/diode here and
minimize the metal trace area connected to this pin to
minimize EMI.
V
IN
(Pin 6/Pin 6):
Input Supply Pin. Must be locally
bypassed.
SS (Pin 7/Pin 5):
Soft-Start Pin. Place a soft-start capacitor
here. Upon start-up, 4μA of current charges the capacitor
to 1.255V. Use a larger capacitor for slower start-up. Leave
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