Datasheet

LTC3810
3
3810fc
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
∆V
FB,LINE
Feedback Voltage Line Regulation 7V < INTV
CC
< 14V (Note 4)
l
0.002 0.02 %/V
V
SENSE(MAX)
Maximum Current Sense Threshold V
RNG
= 2V, V
FB
= 0.76V
V
RNG
= 0V, V
FB
= 0.76V
V
RNG
= INTV
CC
, V
FB
= 0.76V
256
70
170
320
95
215
384
120
260
mV
mV
mV
V
SENSE(MIN)
Minimum Current Sense Threshold V
RNG
= 2V, V
FB
= 0.84V
V
RNG
= 0V, V
FB
= 0.84V
V
RNG
= INTV
CC
, V
FB
= 0.84V
–300
–85
–200
mV
mV
mV
I
VFB
Feedback Current V
FB
= 0.8V 20 150 nA
A
VOL
(EA) Error Amplifi er DC Open Loop Gain 65 100 dB
f
U
Error Amp Unity-Gain Crossover
Frequency
(Note 6) 25 MHz
V
MODE/SYNC
MODE/SYNC Threshold V
MODE/SYNC
Rising 0.75 0.8 0.85 V
I
MODE/SYNC
MODE/SYNC Current MODE/SYNC = 10V 0 1 μA
V
SHDN
Shutdown Threshold 1.2 1.5 2 V
I
SHDN
SHDN Pin Input Current 01 μA
V
VINUV
V
IN
Undervoltage Lockout V
IN
Rising
V
IN
Falling
Hysteresis
l
l
0.86
0.78
0.07
0.88
0.80
0.10
0.92
0.82
0.12
V
V
V
V
VCCUV
INTV
CC
Undervoltage Lockout
Linear Regulator Mode
External Supply Mode
Trickle-Charge Mode
INTV
CC
Rising, I
NDRV
= 100μA
INTV
CC
Rising, NDRV = INTV
CC
= EXTV
CC
INTV
CC
Rising, NDRV = INTV
CC
, EXTV
CC
= 0
INTV
CC
Falling
l
l
l
6.05
6.05
11.7
6.2
6.2
12
5.7
6.35
6.35
12.3
V
V
V
V
Oscillator and Phase-Locked Loop
t
ON
On-Time I
ON
= 100μA
I
ON
= 300μA
1.55
515
1.85
605
2.15
695
μs
ns
t
ON(MIN)
Minimum On-Time I
ON
= 2000μA 100 ns
t
OFF(MIN)
Minimum Off-Time 250 350 ns
t
ON(PLL)
t
ON
Modulation Range by PLL
Down Modulation
Up Modulation
I
ON
= 100μA, V
PLL/LPF
= 0.6V
I
ON
= 100μA, V
PLL/LPF
= 1.8V
2.2
0.6
3.6
1.2
5
1.8
μs
μs
I
PLL/LPF
Phase Detector Output Current
Sinking Capability
Sourcing Capability
f
PLLIN
< f
SW
f
PLLIN
> f
SW
15
–25
μA
μA
Driver
I
BG,PEAK
BG Driver Peak Source Current V
BG
= 0V 1.5 2 A
R
BG,SINK
BG Driver Pull-Down R
DS(ON)
11.5
Ω
I
TG,PEAK
TG Driver Peak Source Current V
TG
– V
SW
= 0V 1.5 2 A
R
TG,SINK
TG Driver Pull-Down R
DS(ON)
11.5
Ω
PGOOD Output
∆V
FBOV
PGOOD Upper Threshold
PGOOD Lower Threshold
V
FB
Rising
V
FB
Falling
7.5
–7.5
10
–10
12.5
–12.5
%
%
∆V
FB,HYST
PGOOD Hysteresis V
FB
Returning 1.5 3 %
V
PGOOD
PGOOD Low Voltage I
PGOOD
= 5mA 0.3 0.6 V
I
PGOOD
PGOOD Leakage Current V
PGOOD
= 5V 0 2 μA
PG Delay PGOOD Delay V
FB
Falling 120 μs
The l denotes specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C (Note 2), INTV
CC
= DRV
CC
= V
BOOST
= V
ON
= V
RNG
= SHDN = UV
IN
=
V
EXTVCC
= V
NDRV
= 10V, V
MODE/SYNC
= V
SENSE
+
= V
SENSE
–
= V
BGRTN
= V
SW
= 0V, unless otherwise specifi ed.
ELECTRICAL CHARACTERISTICS