(Notes 2, 3) ............................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
MSE Only .............................................................. 300°C
PIN CONFIGURATION
TOP VIEW
EN
STBY
CAP
V
IN
SW
1
2
3
4
5
11
GND
10 PGOOD
9 D0
8 D1
7 V
IN2
6 V
OUT
TOP VIEW
EN
STBY
CAP
V
IN
SW
1
2
3
4
5
11
GND
10
9
8
7
6
PGOOD
D0
D1
V
IN2
V
OUT
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W,
θ
JC
= 7.5°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
MSE PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 45°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3388EDD-1#PBF
LTC3388IDD-1#PBF
LTC3388EMSE-1#PBF
LTC3388IMSE-1#PBF
LTC3388EDD-3#PBF
LTC3388IDD-3#PBF
LTC3388EMSE-3#PBF
LTC3388IMSE-3#PBF
TAPE AND REEL
LTC3388EDD-1#TRPBF
LTC3388IDD-1#TRPBF
LTC3388EMSE-1#TRPBF
LTC3388IMSE-1#TRPBF
LTC3388EDD-3#TRPBF
LTC3388IDD-3#TRPBF
LTC3388EMSE-3#TRPBF
LTC3388IMSE-3#TRPBF
PART MARKING*
LFWN
LFWN
LTFWM
LTFWM
LFWQ
LFWQ
LTFWP
LTFWP
PACKAGE DESCRIPTION
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
10-Lead Plastic MSOP
10-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
2
338813fa
For more information
www.linear.com/LTC3388
LTC3388-1/LTC3388-3
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN
I
Q
PARAMETER
Input Voltage Range
V
IN
Quiescent Current When Enabled
UVLO
Sleep
Sleep
Active
V
IN
Quiescent Current Enabled, in Standby
Sleeping
Not Sleeping
V
IN
Quiescent Current When Disabled
V
IN
Undervoltage Lockout Threshold
Regulated Output Voltage (LTC3388-1)
V
IN
= 2V
V
IN
= 4V
V
IN
= 20V
I
SW
= 0A (Note 4)
V
IN
= 4V
V
IN
= 4V
V
IN
= 4V
V
IN
= 20V
V
IN
Rising
V
IN
Falling
1.2V Output Selected; D1 = 0, D0 = 0
Sleep Threshold
Wake-Up Threshold
1.5V Output Selected; D1 = 0, D0 = 1
Sleep Threshold
Wake-Up Threshold
1.8V Output Selected; D1 = 1, D0 = 0
Sleep Threshold
Wake-Up Threshold
2.5V Output Selected; D1 = 1, D0 = 1
Sleep Threshold
Wake-Up Threshold
2.8V Output Selected; D1 = 0, D0 = 0
Sleep Threshold
Wake-Up Threshold
3.0V Output Selected; D1 = 0, D0 = 1
Sleep Threshold
Wake-Up Threshold
3.3V Output Selected; D1 = 1, D0 = 0
Sleep Threshold
Wake-Up Threshold
5.0V Output Selected; D1 = 1, D0 = 1
Sleep Threshold
Wake-Up Threshold
As a Percentage of the Selected V
OUT
100µA Into Pin
LTC3388-1: V
OUT
= 2.5V
LTC3388-3: V
OUT
= 5.0V
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are for T
A
= 25°C (Note 2). Unless otherwise noted, V
IN
= 5.5V.
CONDITIONS
l
MIN
2.7
TYP
MAX
20
UNITS
V
nA
nA
nA
µA
nA
nA
nA
nA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
%
V
nA
nA
400
720
820
150
720
2000
520
620
2.15
2.5
2.3
1.208
1.192
1.508
1.492
1.808
1.792
2.508
2.492
2.816
2.784
3.016
2.984
3.316
3.284
5.016
4.984
92
600
1100
1200
250
1100
3000
800
900
2.65
I
Q,STBY
I
Q,SD
V
UVLO
V
OUT
1.140
1.440
1.737
2.400
1.260
1.560
1.863
2.600
V
OUT
Regulated Output Voltage (LTC3388-3)
2.688
2.895
3.201
4.820
83
2.912
3.105
3.399
5.180
PGOOD Threshold
V
OL, PGOOD
I
VOUT
I
PEAK
I
OUT
R
P, BUCK
R
N, BUCK
PGOOD Output Low Voltage
Output Quiescent Current
PMOS Switch Peak Current
Available Output Current
PMOS Switch On-Resistance
NMOS Switch On-Resistance
Maximum Duty Cycle
0.2
60
120
100
50
1.1
1.3
150
210
mA
mA
Ω
Ω
%
l
100
338813fa
For more information
www.linear.com/LTC3388
3
LTC3388-1/LTC3388-3
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IH
V
IL(D0, D1)
V
IL(EN,STBY)
I
IH
I
IL
PARAMETER
D0/D1/EN/STBY Input High Voltage
D0/D1 Input Low Voltage
EN/STBY Input Low Voltage
D0/D1/EN/STBY Input High Current
D0/D1/EN/STBY Input Low Current
Additional I
Q
at V
IN
with EN at V
IH(MIN)
Additional I
Q
at V
IN
with STBY at V
IH(MIN)
V
EN
= 1.2V, V
IN
= 4V
V
STBY
= 1.2V, V
IN
= 4V
40
40
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are for T
A
= 25°C (Note 2). Unless otherwise noted, V
IN
= 5.5V.
CONDITIONS
l
l
l
MIN
1.2
TYP
MAX
0.4
150
10
10
UNITS
V
V
mV
nA
nA
nA
nA
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 LTC3388-1/LTC3388-3 are tested under pulsed load
conditions such that T
J
≈ T
A
. The LTC3388E-1/LTC3388E-3 are
guaranteed to meet 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 LTC3388I-1/LTC3388I-3 are guaranteed
over the –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.
Note 3:
The junction temperature (T
J
, in °C) is calculated from the ambient
temperature (T
A
, in °C) and power dissipation (PD, 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 4:
Dynamic supply current is higher due to gate charge being
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