Datasheet
LTC3883/LTC3883-1
5
3883fa
For more information www.linear.com/LTC3883
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V, V
RUN
= 3.3V, f
SYNC
= 500kHz (externally
driven) unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage
V
IN
Input Voltage Range (Note 12)
l
4.5 24 V
I
Q
Input Voltage Supply Current
Normal Operation
(Note 14)
V
RUN
= 3.3V, No Caps on TG and BG
V
RUN
= 0V
30
20
mA
mA
V
UVLO
Undervoltage Lockout Threshold
when V
IN
> 4.2V
V
INTVCC
/V
EXTVCC
Falling
V
INTVCC
/V
EXTVCC
Rising
3.7
3.95
V
V
Control Loop
V
OUTR0
Full-Scale Voltage Range 0
Set Point Accuracy (0.6V to 5V)
Resolution
LSB Step Size
VOUT_COMMAND = 5.500V (Note 9)
l
l
5.422
–0.5
12
1.375
5.576
0.5
V
%
Bits
mV
V
OUTR1
Full-Scale Voltage Range 1
Set Point Accuracy (0.6V to 2.5V)
Resolution
LSB Step Size
VOUT_COMMAND = 2.75V (Note 9)
l
l
2.711
–0.5
12
0.6875
2.788
0.5
V
%
Bits
mV
V
LINEREG
Line Regulation 6V < V
IN
< 24V
l
±0.02 %/V
V
LOADREG
Load Regulation ∆V
ITH
= 1.35V – 0.7V
∆V
ITH
= 1.35V – 2.0V
l
l
0.01
–0.01
0.1
–0.1
%
%
g
m
Error Amplifier g
m
I
TH
=1.22V 3 mmho
I
ISENSE
Input Current V
ISENSE
= 5.5V
l
±1 ±2 µA
V
SENSERIN
V
SENSE
Input Resistance to Ground 0V ≤ V
PIN
≤ 5.5V 47 kΩ
V
IlLIMIT
Resolution
3 bits
V
ILIMMAX
Hi Range
Lo Range
l
l
68
44
75
50
82
56
mV
mV
V
ILIMMIN
Hi Range
Lo Range
37.5
25
mV
mV
Gate Driver
TG
t
r
t
f
TG Transition Time:
Rise Time
Fall Time
(Note 4)
C
LOAD
= 3300pF
C
LOAD
= 3300pF
30
30
ns
ns
BG
t
r
t
f
BG Transition Time:
Rise Time
Fall Time
(Note 4)
C
LOAD
= 3300pF
C
LOAD
= 3300pF
20
20
ns
ns
TG/BG t
1D
Top Gate Off to Bottom Gate On Delay Time (Note 4) C
LOAD
= 3300pF 10 ns
BG/TG t
2D
Bottom Gate Off to Top Gate On Delay Time (Note 4) C
LOAD
= 3300pF 30 ns
t
ON(MIN)
Minimum On-Time 90 ns
OV/UV Output Voltage Supervisor
N Resolution 8 bits
V
RANGE0
Voltage Range Range Value = 0
1 5.5 V
V
RANGE1
Voltage Range Range Value = 1
0.4 2.7 V
V
OUSTP0
Step Size Range Value = 0 22 mV
V
OUSTP1
Step Size Range Value = 1 11 mV
V
THACC0
Threshold Accuracy 2V < V
OUT
< 5V Range Value = 0
l
±2 %
V
THACC1
Threshold Accuracy 0.9V < V
OUT
< 2.5V Range Value = 1
l
±2 %
t
PROPOV1
OV Comparator to GPIO Low Time V
OD
= 10% of Threshold 35 µs
t
PROPUV1
UV Comparator to GPIO Low Time V
OD
= 10% of Threshold 35 µs
V
IN
Voltage Supervisor
N Resolution 8 bits