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LTC3633IFE#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
LTC3633
4
3633fd
For more information www.linear.com/LTC3633
ELECTRICAL CHARACTERISTICS
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 LTC3633 is tested under pulsed load conditions such that
T
J
≈
T
A
. The LTC3633E is guaranteed to meet performance specifications
from 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 LTC3633I is guaranteed over the full –40°C to 125°C operating
junction 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
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
(in °C/W) is the package thermal
impedance.
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
LTC3633
5
3633fd
For more information www.linear.com/LTC3633
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
Efficiency vs Input Voltage
Burst Mode Operation
Load Regulation
Oscillator Frequency
vs Temperature
Efficiency vs Load Current
Burst Mode Operation
Efficiency vs Load Current
Forced Continuous Mode
Operation Efficiency vs Load Current
T
J
= 25°C, V
IN
= 12V, f
SW
= 1MHz, L = 1µH unless
otherwise noted.
Oscillator Internal Set Frequency
vs Temperature
Reference Voltage
vs Temperature
1
0
EFFICIENCY (%)
10
30
40
50
70
100
10000
3633 G01
20
80
100
90
60
10 1000
V
IN
= 4V
V
IN
= 8V
V
IN
= 12V
LOAD CURRENT (mA)
V
OUT
= 1.8V
1
0
EFFICIENCY (%)
10
30
40
50
70
100
10000
3633 G02
20
80
100
90
60
10 1000
V
IN
= 4V
V
IN
= 8V
V
IN
= 12V
LOAD CURRENT (mA)
V
OUT
= 1.8V
1
0
EFFICIENCY (%)
10
30
40
50
70
100
10000
3633 G03
20
80
100
90
60
10 1000
V
OUT
= 5V
V
OUT
= 3.3V
LOAD CURRENT (mA)
Burst Mode
OPERATION
FORCED
CONTINUOUS
OPERATION
4
EFFICIENCY (%)
65
70
75
85
8
16
3633 G05
60
90
100
95
80
6 10 12 14
I
LOAD
= 10mA
I
LOAD
= 100mA
I
LOAD
= 1A
I
LOAD
= 3A
INPUT VOLTAGE (V)
V
OUT
= 1.8V
0.1 1
0
EFFICIENCY (%)
10
30
40
50
70
100
10000
3633 G04
20
80
100
90
60
10 1000
LOAD CURRENT (mA)
V
IN
= 4V
V
IN
= 8V
V
IN
= 12V
V
IN
= 15V
V
OUT
= 1.2V
–50
FB
0.597
0.599
50
150
3633 G06
0.595
0.601
0.603
25–25 0 75 100 125
TEMPERATURE (°C)
0
∆V
OUT
/V
OUT
(%)
0.0
0.4
1.5
3
3633 G07
–0.4
0.8
1.6
1.2
10.5 2 2.5
I
LOAD
(A)
Burst Mode OPERATION
FORCED CONTINUOUS
–50
FREQUENCY VARIATION (%)
–8
–6
–4
–2
0
2
4
6
8
25
125
3633 G08
–10
10
0–25 50 75 100
TEMPERATURE (°C)
–50
FREQUENCY (MHz)
1.6
1.8
2.0
2.2
2.4
25
125
3633 G09
1.4
2.6
0–25 50 75 100
TEMPERATURE (°C)
R
T
= INTV
CC
LTC3633
6
3633fd
For more information www.linear.com/LTC3633
TYPICAL PERFORMANCE CHARACTERISTICS
Burst Mode Operation
Internal MOSFET R
DS(ON)
vs Temperature
Quiescent Current vs V
IN
Burst Mode Operation
Switch Leakage vs Temperature
Valley Current Limit
vs Temperature
Track Pull-Up Current
vs Temperature
Shutdown Current vs V
IN
V2P5 Load Regulation Load Step
4
I
Q
(µA)
100
200
300
500
8
16
3633 G11
0
600
800
700
400
6 10 12 14
T
A
= 90°C
T
A
= 25°C
T
A
= –40°C
V
IN
(V)
4
I
Q
(µA)
2
4
6
10
8
16
3633 G12
0
12
20
16
18
14
8
6 10 12 14
V
IN
(V)
–50
LEAKAGE CURRENT (nA)
1000
2000
3000
5000
0
125100
3633 G13
0
6000
7000
4000
–25 25 50 75
TEMPERATURE (°C)
MAIN SWITCH
SYNCHRONOUS SWITCH
T
J
= 25°C, V
IN
= 12V, f
SW
= 1MHz, L = 1µH unless
otherwise noted.
TEMPERATURE (°C)
–50
1.4
1.6
2.0
25 75
3633 G15
1.2
1.0
–25 0
50 100 125
0.8
0.6
1.8
I
TRACK
(µA)
–50
I
LIM
(A)
3.4
3.5
50
3633 G14
3.3
3.7
3.6
3.9
3.8
25–25 0 75 100 125
TEMPERATURE (°C)
0
V2P5(V)
2.496
2.498
6
3633 G16
2.494
2.502
2.500
2.494
2.506
2.504
42 8 10
I
LOAD
(mA)
I
L
1A/DIV
SW
10V/DIV
5µs/DIV
3633 G17
V
OUT
50mV/DIV
V
OUT
= 1.8V
I
LOAD
= 100mA
I
L
2A/DIV
20µs/DIV
3633 G18
V
OUT
AC-COUPLED
100mV/DIV
V
OUT
= 1.8V
I
LOAD
= 100mA to 3A
C
ITH
= 220pF
R
ITH
= 13kΩ
–50
R
DS(ON)
(mΩ)
20
40
60
80
100
120
140
25
125
3633 G10
0
160
0–25 50 75 100
TEMPERATURE (°C)
TOP SWITCH
BOTTOM SWITCH
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LTC3633IFE#PBF

Mfr. #:
Buy LTC3633IFE#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Dual 3A, 15Vin, 4MHz, Monolithic Synchronous Step-Down Regulator
Lifecycle:
New from this manufacturer.
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