LTC3630
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN
V
OUT
UVLO
PARAMETER
Input Voltage Operating Range
Output Voltage Operating Range
V
IN
Undervoltage Lockout
V
IN
Rising
V
IN
Falling
Hysteresis
l
l
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, unless otherwise noted.
CONDITIONS
MIN
4
0.8
3.45
3.30
3.65
3.5
150
165
12
5
1.17
1.06
1.21
1.10
110
TYP
MAX
65
V
IN
3.85
3.70
UNITS
V
V
V
V
mV
μA
μA
μA
V
V
mV
Input Supply (V
IN
)
I
Q
DC Supply Current (Note 5)
Active Mode
Sleep Mode
Shutdown Mode
RUN Pin Threshold Voltage
No Load
V
RUN
= 0V
RUN Rising
RUN Falling
Hysteresis
V
FB
Rising, V
PRG1
= V
PRG2
= 0V
LTC3630E, LTC3630I
LTC3630H, LTC3630MP
V
FB
Falling, V
PRG1
= V
PRG2
= 0V
V
FB
= 1V, V
PRG1
= 0V, V
PRG2
= 0V
V
FB
Rising, V
PRG1
= SS, V
PRG2
= 0V
V
FB
Falling, V
PRG1
= SS, V
PRG2
= 0V
V
FB
Rising, V
PRG1
= 0V, V
PRG2
= SS
V
FB
Falling, V
PRG1
= 0V, V
PRG2
= SS
V
FB
Rising, V
PRG1
= V
PRG2
= SS
V
FB
Falling, V
PRG1
= V
PRG2
= SS
l
l
l
l
l
l
270
20
10
1.25
1.14
V
RUN
Output Supply (V
FB
)
V
FB(ADJ)
Feedback Comparator Threshold Voltage
(Adjustable Output)
Feedback Comparator Hysteresis
(Adjustable Output)
Feedback Pin Current
Feedback Comparator Threshold Voltages
(Fixed Output)
l
l
l
0.792
0.788
2.5
–10
4.940
4.910
3.260
3.240
1.780
1.770
0.800
0.800
5
0
5.015
4.985
3.310
3.290
1.810
1.8
0.001
0.808
0.812
7
10
5.090
5.060
3.360
3.340
1.840
1.83
V
V
mV
nA
V
V
V
V
V
V
%/V
V
FBH
I
FB
V
FB(FIXED)
ΔV
LINEREG
Operation
I
PEAK
Feedback Voltage Line Regulation
Peak Current Comparator Threshold
V
IN
= 4V to 65V
I
SET
Floating
100k Resistor from I
SET
to GND
I
SET
Shorted to GND
I
SW
= –200mA
I
SW
= 200mA
RUN = Open, V
IN
= 65V, SW = 0V
V
SS
< 2.5V
SS Pin Floating
3
l
l
l
1
0.45
0.09
1.2
0.6
0.12
1.00
0.53
0.1
5
0.8
1.4
0.75
0.15
A
A
A
Ω
Ω
R
ON
Power Switch On-Resistance
Top Switch
Bottom Switch
Switch Pin Leakage Current
Soft-Start Pin Pull-Up Current
Internal Soft-Start Time
I
LSW
I
SS
t
INT(SS)
1
6
μA
μA
ms
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTC3630 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTC3630E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3630I is guaranteed
over the –40°C to 125°C operating junction temperature range, the
LTC3630H is guaranteed over the –40°C to 150°C operating junction
temperature range and the LTC3630MP is tested and guaranteed over the
–55°C to 150°C operating junction temperature range.
High junction temperatures degrade operating lifetimes; operating lifetime
is derated for junction temperatures greater than 125°C. Note that the
maximum ambient temperature consistent with these specifications is
determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors.
Note 3:
The junction temperature (T
J
, in °C) is calculated from the ambient
temperature (T
A
, in °C) and power dissipation (P
D
, in Watts) according to
the formula:
T
J
= T
A
+ (P
D
•
θ
JA
)
where
θ
JA
is 43°C/W for the DFN or 45°C/W for the MSOP
.
3630fb
3
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
