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LTC3388EDD-1#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LTC3388-1/LTC3388-3
1
338813fa
For more information www.linear.com/LTC3388
TYPICAL APPLICATION
FEATURES DESCRIPTION
20V High Efficiency
Nanopower
Step-Down Regulator
The LTC
®
3388-1/LTC3388-3 are high efficiency step-down
DC/DC converters with internal high side and synchronous
power switches that draw only 720nA typical DC supplycur-
rent at no load while maintaining output voltage regulation.
Capable of supplying 50mA of load current, the LTC3388-1/
LTC3388-3 also incorporate an accurate undervoltage
lockout (UVLO) feature to disable the converter and main-
tain a low quiescent current state when the input voltage
falls below 2.3V. In regulation, the LTC3388-1/LTC3388-3
enter a sleep state in which both input and output quies-
cent currents are minimal. The buck converter turns on
and off as needed to maintain regulation. An additional
standby mode disables buck switching while the output is
in regulation for short duration loads requiring low ripple.
Output voltages of 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1)
and 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) are pin selectable.
The LTC3388-1/LTC3388-3 can operate with V
IN
up to 20V
while the no load quiescent current remains below 1µA.
L, LT , LT C , LT M, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
50mA Step-Down Converter
APPLICATIONS
n
720nA Input I
Q
in Regulation (No Load), V
IN
= 4V
n
820nA Input I
Q
in Regulation (No Load), V
IN
= 20V
n
400nA Input I
Q
in UVLO
n
2.7V to 20V Input Operating Range
n
Up to 50mA of Output Current
n
Pin Selectable Output Voltages:
n
1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1)
n
2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3)
n
High Efficiency Hysteretic Synchronous
DC/DC Conversion
n
Standby Mode Disables Buck Switching
n
Available in 10-Lead MSE and 3mm × 3mm
DFN Packages
n
Keep Alive Power for Portable Products
n
Industrial Control Supplies
n
Distributed Power Systems
n
Battery-Operated Devices
338813 TA01a
V
IN
CAP
V
IN2
EN
STBY
SW
V
OUT
PGOOD
D0, D1
LTC3388-1/
LTC3388-3
GND
1µF
6V
4.7µF
6V
2.2µF
25V
2.7V TO 20V
47µF
6V
OUTPUT
VOLTAGE
SELECT
V
OUT
100µH
2
Efficiency vs Load Current
LOAD CURRENT (A)
EFFICIENCY (%)
100
40
50
30
20
80
90
70
60
10
0
338813 TA01b
100µ 1m 10m1µ 10µ
V
OUT
= 1.8V, L = 100µH
V
IN
= 3.0V
V
IN
= 10V
V
IN
= 20V
LTC3388-1/LTC3388-3
2
338813fa
For more information www.linear.com/LTC3388
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
IN
............................................................. –0.3V to 22V
D0, D1
..............–0.3V to [Lesser of (V
IN2
+ 0.3V) or 6V]
CAP
...................... [Higher of –0.3V or (V
IN
– 6V)] to V
IN
V
IN2
, V
OUT
..........–0.3V to [Lesser of (V
IN
+ 0.3V) or 6V]
EN, STBY
..................................................... –0.3V to 6V
PGOOD
......................................................... –0.3V to 6V
(Note 1)
TOP VIEW
11
GND
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
PGOOD
D0
D1
V
IN2
V
OUT
EN
STBY
CAP
V
IN
SW
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
1
2
3
4
5
EN
STBY
CAP
V
IN
SW
10
9
8
7
6
PGOOD
D0
D1
V
IN2
V
OUT
TOP VIEW
MSE PACKAGE
10-LEAD PLASTIC MSOP
11
GND
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 TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3388EDD-1#PBF LTC3388EDD-1#TRPBF LFWN 10-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C
LTC3388IDD-1#PBF LTC3388IDD-1#TRPBF LFWN 10-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C
LTC3388EMSE-1#PBF LTC3388EMSE-1#TRPBF LTFWM 10-Lead Plastic MSOP –40°C to 125°C
LTC3388IMSE-1#PBF LTC3388IMSE-1#TRPBF LTFWM 10-Lead Plastic MSOP –40°C to 125°C
LTC3388EDD-3#PBF LTC3388EDD-3#TRPBF LFWQ 10-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C
LTC3388IDD-3#PBF LTC3388IDD-3#TRPBF LFWQ 10-Lead (3mm × 3mm
) Plastic DFN –40°C to 125°C
LTC3388EMSE-3#PBF LTC3388EMSE-3#TRPBF LTFWP 10-Lead Plastic MSOP –40°C to 125°C
LTC3388IMSE-3#PBF LTC3388IMSE-3#TRPBF LTFWP 10-Lead Plastic MSOP –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/
I
SW
.......................................................................210mA
Operating Junction Temperature Range
(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
LTC3388-1/LTC3388-3
3
338813fa
For more information www.linear.com/LTC3388
ELECTRICAL CHARACTERISTICS
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.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Range
l
2.7 20 V
I
Q
V
IN
Quiescent Current When Enabled
UVLO
Sleep
Sleep
Active
V
IN
= 2V
V
IN
= 4V
V
IN
= 20V
I
SW
= 0A (Note 4)
400
720
820
150
600
1100
1200
250
nA
nA
nA
µA
I
Q,STBY
V
IN
Quiescent Current Enabled, in Standby
Sleeping
Not Sleeping
V
IN
= 4V
V
IN
= 4V
720
2000
1100
3000
nA
nA
I
Q,SD
V
IN
Quiescent Current When Disabled V
IN
= 4V
V
IN
= 20V
520
620
800
900
nA
nA
V
UVLO
V
IN
Undervoltage Lockout Threshold V
IN
Rising
V
IN
Falling
l
l
2.15
2.5
2.3
2.65 V
V
V
OUT
Regulated Output Voltage (LTC3388-1) 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
l
l
l
l
l
l
l
l
1.140
1.440
1.737
2.400
1.208
1.192
1.508
1.492
1.808
1.792
2.508
2.492
1.260
1.560
1.863
2.600
V
V
V
V
V
V
V
V
V
OUT
Regulated Output Voltage (LTC3388-3) 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
l
l
l
l
l
l
l
l
2.688
2.895
3.201
4.820
2.816
2.784
3.016
2.984
3.316
3.284
5.016
4.984
2.912
3.105
3.399
5.180
V
V
V
V
V
V
V
V
PGOOD Threshold As a Percentage of the Selected V
OUT
83 92 %
V
OL, PGOOD
PGOOD Output Low Voltage 100µA Into Pin
l
0.2 V
I
VOUT
Output Quiescent Current LTC3388-1: V
OUT
= 2.5V
LTC3388-3: V
OUT
= 5.0V
60
120
nA
nA
I
PEAK
PMOS Switch Peak Current
l
100 150 210 mA
I
OUT
Available Output Current
l
50 mA
R
P, BUCK
PMOS Switch On-Resistance 1.1 Ω
R
N, BUCK
NMOS Switch On-Resistance 1.3 Ω
Maximum Duty Cycle
l
100 %
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LTC3388EDD-1#PBF

Mfr. #:
Buy LTC3388EDD-1#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 20V/50mA High Efficiency Step-Down Regulator with <1uA Quiescent Current
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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