LTC3631IMS8E#TRPBF Linear Technology, LTC3631IMS8E#TRPBF Datasheet - Page 3

• Manufacturer Part Number: LTC3631IMS8E#TRPBF
• Description: IC CONV STP-DWN SYNC ADJ 8-MSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3631IMS8E#TRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 45 V
• Current - Output: 100mA
• Voltage - Input: 4.5 ~ 45 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP Exposed Pad, 8-HMSOP, 8-eMSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -

elecTrical characTerisTics
junction temperature range, otherwise specifications are for T
SYMBOL
Input Supply (V
V
UVLO
OVLO
I
Output Supply (V
V
V
V
I
∆V
Operation
V
I
V
I
I
t
I
R
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 LTC3631 is tested under pulsed load conditions such that
T
0°C to 85°C junction temperature. Specifications over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3631I is guaranteed over the full –40°C to 125°C operating junction
Q
FB
RUN
HYST
SS
INTSS
PEAK
J
IN
OUT
FB
HYST
RUN
HYSTL
ON
LINEREG
≈ T
A
. The LTC3631E is guaranteed to meet specifications from
IN
PARAMETER
Input Voltage Operating Range
V
V
DC Supply Current (Note 3)
Output Voltage Trip Thresholds
Feedback Comparator Trip Voltage
Feedback Comparator Hysteresis
Feedback Pin Current
Feedback Voltage Line Regulation
Run Pin Threshold Voltage
Run Pin Leakage Current
Hysteresis Pin Voltage Low
Hysteresis Pin Leakage Current
Soft-Start Pin Pull-Up Current
Internal Soft-Start Time
Peak Current Trip Threshold
Power Switch On-Resistance
OUT
)
IN
IN
Active Mode
Sleep Mode
Shutdown Mode
Top Switch
Bottom Switch
Undervoltage Lockout
Overvoltage Lockout
/V
FB
)
CONDITIONS
V
V
Hysteresis
V
V
Hysteresis
V
LTC3631-3.3V, V
LTC3631-3.3V, V
LTC3631-5V, V
LTC3631-5V, V
V
Adjustable Output Version, V
V
LTC3631-5, V
RUN Rising
RUN Falling
Hysteresis
RUN = 1.3V
RUN < 1V, I
V
V
SS Pin Floating
I
500k Resistor from I
I
I
I
SET
SET
SW
SW
IN
IN
IN
IN
RUN
FB
IN
HYST
SS
Rising
Falling
Rising
Falling
= 4.5V to 45V
Rising
= –25mA
= 25mA
< 1.5V
Floating
Shorted to GND
= 0V
= 1.3V
The
HYST
A
l
= 25°C (Note 2). V
IN
OUT
OUT
denotes the specifications which apply over the full operating
= 6V to 45V
OUT
OUT
= 1mA
Rising
Falling
temperature range. 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. The junction temperature
(T
dissipation (PD, in Watts) according to the formula:
where θ
Note 3: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Rising
Falling
SET
J
, in °C) is calculated from the ambient temperature (T
T
to GND
J
= T
JA
FB
A
(in °C/W) is the package thermal impedance.
+ (PD • θ
= 1V
IN
= 10V, unless otherwise noted.
JA
)
l
l
l
l
l
l
l
l
l
3.260
3.240
4.940
4.910
0.792
3.80
3.75
1.17
1.06
MIN
–10
–10
–10
200
4.5
4.5
47
45
40
3
3.310
3.290
5.015
4.985
0.800
0.001
4.15
4.00
1.21
1.10
0.07
0.75
TYP
150
125
110
225
120
5.5
3.0
1.5
50
48
12
50
2
3
5
0
0
0
LTC3631
A
3.360
3.340
5.090
5.060
0.808
MAX
4.50
4.35
1.25
1.14
, in °C) and power
220
280
0.1
6.5
45
52
50
22
10
10
10
65
6
7
UNITS
3631fc
3
%/V
mV
mV
mV
mA
mA
mA
ms
µA
µA
µA
nA
nA
nA
µA
Ω
Ω
V
V
V
V
V
V
V
V
V
V
V
V
V
V