LTC3808 Datasheet, PDF (2/28 Pages) Linear Technology – No RSENSE TM, Low EMI, Synchronous DC/DC Controller with Output Tracking

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