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LTC3808 Datasheet(PDF) 2 Page - Linear Technology

Part # LTC3808
Description  No RSENSE, Low EMI, Synchronous DC/DC Controller with Output Tracking
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3808 Datasheet(HTML) 2 Page - Linear Technology

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2
LTC3808
3808f
ORDER PART
NUMBER
Input Supply Voltage (VIN)........................ – 0.3V to 10V
PLLLPF, RUN, SYNC/MODE, TRACK/SS,
SENSE+, IPRG Voltages ............ – 0.3V to (VIN + 0.3V)
VFB, ITH Voltages...................................... –0.3V to 2.4V
SW, SENSE– Voltages ......... – 2V to VIN + 1V (10V Max)
PGOOD ..................................................... – 0.3V to 10V
LTC3808EDE
TJMAX = 125°C, θJA = 130°C/W
ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
Consult LTC Marketing for parts specified with wider operating temperature ranges.
(Note 1)
TG, BG Peak Output Current (<10µs)........................ 1A
Operating Temperature Range (Note 2) ... – 40°C to 85°C
Storage Ambient Temperature Range ... – 65°C to 125°C
Junction Temperature (Note 3) ............................ 125°C
Lead Temperature (Soldering, 10 sec)
GN16 Package .................................................. 300°C
1
2
3
4
5
6
7
14
13
12
11
10
9
8
SW
SENSE–
V
IN
SENSE+
TG
BG
IPRG
PLLLPF
SYNC/MODE
TRACK/SS
PGOOD
VFB
ITH
RUN
TOP VIEW
15
DE PACKAGE
14-LEAD (4mm × 3mm) PLASTIC DFN
ORDER PART
NUMBER
LTC3808EGN
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
GND
PLLLPF
SYNC/MODE
TRACK/SS
PGOOD
VFB
ITH
RUN
SW
SENSE–
VIN
SENSE+
TG
BG
IPRG
GND
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 15) IS GND
(MUST BE SOLDERED TO PCB)
DE PART
MARKING
3808
The
● indicates specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 4.2V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loops
Input DC Supply Current
(Note 4)
Normal Operation
350
500
µA
Sleep Mode
105
150
µA
Shutdown
RUN = 0V
9
20
µA
UVLO
VIN = UVLO Threshold – 200mV
9
20
µA
Undervoltage Lockout Threshold
VIN Falling
●
1.95
2.25
2.55
V
VIN Rising
●
2.15
2.45
2.75
V
Shutdown Threshold of RUN Pin
0.8
1.1
1.4
V
Start-Up Current Source
TRACK/SS = 0V
0.65
1
1.35
µA
Regulated Feedback Voltage
(Note 5)
●
0.591
0.6
0.609
V
Output Voltage Line Regulation
2.75V < VIN < 9.8V (Note 5)
0.01
0.04
%/V
Output Voltage Load Regulation
ITH = 0.9V (Note 5)
0.1
0.5
%
ITH = 1.7V
–0.1
–0.5
%
VFB Input Current
(Note 5)
9
50
nA
Overvoltage Protect Threshold
Measured at VFB
0.66
0.68
0.7
V


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