Datasheet

LTC3810-5
3
38105fd
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
INTV
CC
INTV
CC
Supply Voltage
l
4.35 14 V
I
Q
INTV
CC
Supply Current
INTV
CC
Shutdown Current
SHDN > 1.5V (Notes 4, 5)
SHDN = 0V
3
240
6
600
mA
µA
I
BOOST
BOOST Supply Current SHDN > 1.5V (Note 5)
SHDN = 0V
270
0
400
5
µA
µA
V
FB
Feedback Voltage (Note 4)
0°C to 85°C
–40°C to 85°C
–40°C to 125°C (I-Grade)
–40°C to 150°C (H-Grade)
l
l
l
l
0.796
0.794
0.792
0.792
0.792
0.800
0.800
0.800
0.800
0.800
0.804
0.806
0.806
0.808
0.812
V
V
V
V
V
DV
FB,LINE
Feedback Voltage Line Regulation 5V < 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 Amplifier 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 = 5V 0 1 µA
V
SHDN
Shutdown Threshold 1.2 1.5 2 V
I
SHDN
SHDN Pin Input Current 0 1 µA
V
UVIN
UVIN Undervoltage Lockout UVIN Rising
UVIN Falling
Hysteresis
l
l
0.86
0.78
0.07
0.89
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
4.05
4.05
8.70
4.2
4.2
9
3.7
4.35
4.35
9.30
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 0.7 1 A
R
BG,SINK
BG Driver Pull-Down R
DS(ON)
1 1.5 Ω
I
TG,PEAK
TG Driver Peak Source Current V
TG
– V
SW
= 0 0.7 1 A
R
TG,SINK
TG Driver Pull-Down R
DS(ON)
1 1.5 Ω
The l denotes specifications which apply over the full operating
temperature range, otherwise specifications 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
= 5V, V
MODE/SYNC
= V
SENSE
+
= V
SENSE
–
= V
BGRTN
= V
SW
= 0V, unless otherwise specified.
elecTrical characTerisTics