Datasheet

LTC3814-5
3
38145fc
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
RUN/SS > 1.5V (Notes 4, 5)
RUN/SS = 0V
3
224
6
600
mA
µA
I
BOOST
BOOST Supply Current RUN/SS > 1.5V (Note 5)
RUN/SS = 0V
240
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
l
l
l
0.796
0.794
0.792
0.792
0.800
0.800
0.800
0.800
0.804
0.806
0.806
0.808
V
V
V
V
∆V
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 Amplifi er DC Open-Loop Gain 65 100 dB
f
U
Error Amp Unity Gain Crossover
Frequency
(Note 6) 25 MHz
V
RUN/SS
Shutdown Threshold 0.6 0.9 1.2 V
I
RUN/SS
RUN/SS Source Current RUN/SS = 0V 0.7 1.4 2.5 µA
V
VCCUV
INTV
CC
Undervoltage Lockout INTV
CC
Rising
Hysteresis
l
4.05 4.2
0.5
4.35 V
V
Oscillator
t
OFF
Off-Time I
OFF
= 100µA
I
OFF
= 300µA
1.55
515
1.85
605
2.15
695
µs
ns
t
OFF(MIN)
Minimum Off-Time I
OFF
= 2000µA 100 ns
t
ON(MIN)
Minimum On-Time 350 ns
Driver
I
BG,PEAK
BG Driver Peak Source Current V
BG
= 0V 0.7 1 A
R
BG,SINK
BG Driver Pulldown R
DS(ON)
1 1.5
Ω
I
TG,PEAK
TG Driver Peak Source Current V
TG
– V
SW
= 0V 0.7 1 A
R
TG,SINK
TG Driver Pulldown R
DS(ON)
1 1.5
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
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
= V
BOOST
= V
RNG
= V
EXTVCC
= V
NDRV
= V
OFF
= 5V, unless
otherwise specifi ed.
ELECTRICAL CHARACTERISTICS