LINER LT3022-1.8 1a, 0.9v to 10v, very low dropout linear regulator Datasheet

LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
1A, 0.9V to 10V,
Very Low Dropout
Linear Regulator
FEATURES
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DESCRIPTION
VIN Range: 0.9V to 10V
Dropout Voltage: 145mV Typical
Output Current: 1A
Adjustable Output (VREF = VOUT(MIN) = 200mV)
Fixed Output Voltages: 1.2V, 1.5V, 1.8V
Stable with Low ESR, Ceramic Output Capacitors
(10µF Minimum)
0.05% Typical Load Regulation from 1mA to 1A
Quiescent Current: 400µA Typical
7.5µA Typical Quiescent Current in Shutdown
Current Limit Protection
Reverse-Battery Protection with No Reverse Current
Thermal Limiting with Hysteresis
16-Lead (5mm × 3mm) DFN and MSOP Packages
APPLICATIONS
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High Efficiency Linear Regulators
Battery-Powered Systems
Logic Supplies
Post Regulator for Switching Supplies
Wireless Modems
FPGA Core Supplies
The LT®3022 is a very low dropout voltage (VLDO™) linear
regulator that operates from single input supplies down to
0.9V. The device supplies 1A output current with 145mV
typical dropout voltage. The LT3022 is ideal for low input
voltage to low output voltage applications, providing
comparable electrical efficiency to a switching regulator.
The regulator optimizes stability and transient response
with low ESR ceramic output capacitors as small as 10µF.
Other LT3022 features include 0.05% typical line regulation
and 0.05% typical load regulation. In shutdown, quiescent
current typically drops to 7.5µA. Internal protection circuitry
includes reverse-battery protection, current limiting, thermal limiting with hysteresis and reverse-current protection.
The LT3022 is available as an adjustable device with
an output voltage range down to the 200mV reference.
Three fixed output voltages, 1.2V, 1.5V and 1.8V are also
offered. The LT3022 regulator is available in the thermally
enhanced low profile (0.75mm) 16-lead (5mm × 3mm)
DFN and MSOP packages.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. VLDO is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Minimum Input Voltage
1.1
IN
10µF
OUT
LT3022
SHDN
GND
ADJ
698Ω
1%
200Ω
1%
3022 TA01a
VOUT
0.9V
10µF 1A
MINIMUM INPUT VOLTAGE (V)
VIN
1.2V
IL = 1A
1.0
1.2V to 0.9V, 1A VLDO Regulator
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
3022 TA01b
3022fb
1
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
ABSOLUTE MAXIMUM RATINGS
(Note 1)
IN Pin Voltage......................................................... ±10V
OUT Pin Voltage...................................................... ±10V
Input-to-Output Differential Voltage........................ ±10V
ADJ/SENSE Pin Voltage.......................................... ±10V
SHDN Pin Voltage................................................... ±10V
Output Short-Circuit Duration.......................... Indefinite
Operating Junction Temperature Range
E-, I-Grades (Notes 2, 3).................... –40°C to 125°C
Storage Temperature Range.................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSOP Package................................................. 300°C
PIN CONFIGURATION
TOP VIEW
NC
1
16 NC
NC
2
15 NC
OUT
3
14 IN
OUT
4
ADJ
5
AGND
6
11 PGND
AGND
7
10 PGND
NC
8
9
17
GND
13 IN
12 IN
SHDN
DHC PACKAGE
16-LEAD (5mm × 3mm) PLASTIC DFN
TJMAX = 125°C, qJA = 38°C/W*, qJC = 4°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*SEE THE APPLICATIONS INFORMATION SECTION
TOP VIEW
NC
NC
OUT
OUT
ADJ/SENSE*
AGND
AGND
NC
1
2
3
4
5
6
7
8
17
GND
16
15
14
13
12
11
10
9
NC
NC
IN
IN
IN
PGND
PGND
SHDN
MSE PACKAGE
16-LEAD PLASTIC MSOP
TJMAX = 125°C, qJA = 38°C/W**, qJC = 5°C/W TO 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*PIN 5: ADJ FOR LT3022
SENSE FOR LT3022-1.2/LT3022-1.5/LT3022-1.8
**SEE THE APPLICATIONS INFORMATION SECTION
3022fb
2
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3022EDHC#PBF
LT3022EDHC#TRPBF
3022
16-Lead (5mm × 3mm) Plastic DFN
–40°C to 125°C
LT3022IDHC#PBF
LT3022IDHC#TRPBF
3022
16-Lead (5mm × 3mm) Plastic DFN
–40°C to 125°C
LT3022EMSE#PBF
LT3022EMSE#TRPBF
3022
16-Lead Plastic MSOP
–40°C to 125°C
LT3022IMSE#PBF
LT3022IMSE#TRPBF
3022
16-Lead Plastic MSOP
–40°C to 125°C
LT3022EMSE-1.2#PBF
LT3022EMSE-1.2#TRPBF
302212
16-Lead Plastic MSOP
–40°C to 125°C
LT3022IMSE-1.2#PBF
LT3022IMSE-1.2#TRPBF
302212
16-Lead Plastic MSOP
–40°C to 125°C
LT3022EMSE-1.5#PBF
LT3022EMSE-1.5#TRPBF
302215
16-Lead Plastic MSOP
–40°C to 125°C
LT3022IMSE-1.5#PBF
LT3022IMSE-1.5#TRPBF
302215
16-Lead Plastic MSOP
–40°C to 125°C
LT3022EMSE-1.8#PBF
LT3022EMSE-1.8#TRPBF
302218
16-Lead Plastic MSOP
–40°C to 125°C
LT3022IMSE-1.8#PBF
LT3022IMSE-1.8#TRPBF
302218
16-Lead Plastic MSOP
–40°C to 125°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3022EDHC
LT3022EDHC#TR
3022
16-Lead (5mm × 3mm) Plastic DFN
–40°C to 125°C
LT3022IDHC
LT3022IDHC#TR
3022
16-Lead (5mm × 3mm) Plastic DFN
–40°C to 125°C
LT3022EMSE
LT3022EMSE#TR
3022
16-Lead Plastic MSOP
–40°C to 125°C
LT3022IMSE
LT3022IMSE#TR
3022
16-Lead Plastic MSOP
–40°C to 125°C
LT3022EMSE-1.2
LT3022EMSE-1.2#TR
302212
16-Lead Plastic MSOP
–40°C to 125°C
LT3022IMSE-1.2
LT3022IMSE-1.2#TR
302212
16-Lead Plastic MSOP
–40°C to 125°C
LT3022EMSE-1.5
LT3022EMSE-1.5#TR
302215
16-Lead Plastic MSOP
–40°C to 125°C
LT3022IMSE-1.5
LT3022IMSE-1.5#TR
302215
16-Lead Plastic MSOP
–40°C to 125°C
LT3022EMSE-1.8
LT3022EMSE-1.8#TR
302218
16-Lead Plastic MSOP
–40°C to 125°C
LT3022IMSE-1.8
LT3022IMSE-1.8#TR
302218
16-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.
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/
3022fb
3
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
Minimum Input Voltage (Notes 4, 6)
ILOAD = 1A, TA > 0°C
ILOAD = 1A, TA ≤ 0°C
ADJ Pin Voltage (Notes 5, 6)
VIN = 1.5V, ILOAD = 1mA
1.15V < VIN < 10V, 1mA < ILOAD < 1A
Regulated Output Voltage (Note 5)
LT3022-1.2
LT3022-1.5
LT3022-1.8
MIN
1.05
1.10
V
V
mV
mV
204
206
VIN = 1.5V, ILOAD = 1mA
1.5V < VIN < 10V, 1mA < ILOAD <1A
l
1.176
1.164
1.200
1.200
1.224
1.236
V
V
VIN = 1.8V, ILOAD = 1mA
1.8V < VIN < 10V, 1mA < ILOAD <1A
l
1.470
1.455
1.500
1.500
1.530
1.545
V
V
VIN = 2.1V, ILOAD = 1mA
2.1V < VIN < 10V, 1mA < ILOAD <1A
l
1.764
1.746
1.800
1.800
1.836
1.854
V
V
l
l
l
l
–1.5
–9
–11
–13.5
–0.1
0.6
0.8
1
0.5
3.5
4
5
mV
mV
mV
mV
–0.5
–1.0
0.1
l
0.5
1.0
mV
mV
–3
–6
0.6
l
3
6
mV
mV
–3.8
–7.5
1
l
3.8
7.5
mV
mV
–4.5
–9
1.2
l
4.5
9
mV
mV
45
75
135
mV
mV
55
90
175
mV
mV
110
150
235
mV
mV
145
185
285
mV
mV
3.5
8.5
20
36
µA
mA
mA
mA
mA
Load Regulation (Note 7)
LT3022
VIN = 1.15V, ∆ILOAD = 1mA to 1A
Dropout Voltage (Notes 8, 9)
0.9
0.9
200
200
∆VIN = 1.15V to 10V, ILOAD = 1mA
∆VIN = 1.5V to 10V, ILOAD = 1mA
∆VIN = 1.8V to 10V, ILOAD = 1mA
∆VIN = 2.1V to 10V, ILOAD = 1mA
LT3022-1.8
UNITS
196
194
LT3022
LT3022-1.2
LT3022-1.5
LT3022-1.8
LT3022-1.5
MAX
l
Line Regulation (Note 7)
LT3022-1.2
TYP
VIN = 1.5V, ∆ILOAD = 1mA to 1A
VIN = 1.8V, ∆ILOAD = 1mA to 1A
VIN = 2.1V, ∆ILOAD = 1mA to 1A
ILOAD = 10mA
l
ILOAD = 100mA
l
ILOAD = 500mA
l
ILOAD = 1A
l
GND Pin Current, VIN = VOUT(NOMINAL) + 0.4V
(Notes 9, 10)
ILOAD = 0mA
ILOAD = 1mA
ILOAD = 100mA
ILOAD = 500mA
ILOAD = 1A
400
1.2
3.4
8.3
18
Output Voltage Noise
COUT = 10µF, ILOAD = 1A, BW = 10Hz to 100kHz,
VOUT = 1.2V
165
ADJ Pin Bias Current (Notes 7, 11)
VADJ = 0.2V, VIN = 1.5V
30
100
nA
Shutdown Threshold
VOUT = Off to On
VOUT = On to Off
l
l
0.64
0.64
0.9
V
V
SHDN Pin Current (Note 12)
VSHDN = 0V, VIN = 10V
VSHDN = 10V, VIN = 10V
l
l
3
±1
9.5
µA
µA
Quiescent Current in Shutdown
VIN = 6V, VSHDN = 0V
7.5
15
µA
l
l
l
l
0.25
µVRMS
3022fb
4
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
Ripple Rejection (Note 13)
LT3022
Current Limit (Note 9)
MIN
TYP
VIN – VOUT = 1V, VRIPPLE = 0.5VP-P ,
fRIPPLE = 120Hz, ILOAD = 1A
55
70
dB
LT3022-1.2
VIN – VOUT = 1V, VRIPPLE = 0.5VP-P ,
fRIPPLE = 120Hz, ILOAD = 1A
51
66
dB
LT3022-1.5
VIN – VOUT = 1V, VRIPPLE = 0.5VP-P ,
fRIPPLE = 120Hz, ILOAD = 1A
51
66
dB
LT3022-1.8
VIN – VOUT = 1V, VRIPPLE = 0.5VP-P ,
fRIPPLE = 120Hz, ILOAD = 1A
51
66
dB
1.1
2.6
1.7
A
A
VIN = 10V, VOUT = 0V
VIN = VOUT(NOMINAL) + 0.5V, ∆VOUT ≤ –5%
Input Reverse Leakage Current (Note 14)
VIN = –10V, VOUT = 0V
Reverse Output Current (Notes 15, 16)
LT3022
LT3022-1.2
LT3022-1.5
LT3022-1.8
Minimum Required Output Current
VIN = 1.6V, VOUT = 1.2V
l
VOUT = 1.2V, VIN = 0V
VOUT = 1.2V, VIN = 0V
VOUT = 1.5V, VIN = 0V
VOUT = 1.8V, VIN = 0V
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 LT3022 regulator is tested and specified under pulse load
conditions such that TJ ≈ TA. The LT3022 is 100% tested at TA = 25°C.
Performance of the LT3022E over the full –40°C and 125°C operating
junction temperature range is assured by design, characterization and
correlation with statistical process controls. The LT3022I regulators are
guaranteed over the full –40°C to 125°C operating junction temperature
range. High junction temperatures degrade operating lifetime. Operating
lifetime is derated at junction temperatures greater than 125°C.
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: Minimum input voltage is the voltage required by the LT3022 to
regulate the output voltage and supply the rated 1A output current. This
specification is tested at VOUT = 0.2V. For higher output voltages, the
minimum input voltage required for regulation equals the regulated output
voltage VOUT plus the dropout voltage or 1.1V, whichever is greater.
Note 5: Maximum junction temperature limits operating conditions. The
regulated output voltage specification does not apply for all possible
combinations of input voltage and output current. Limit the output current
range if operating at maximum input voltage. Limit the input-to-output
voltage differential range if operating at maximum output current.
Note 6: The LT3022 typically supplies 1A output current with a 0.9V input
supply. The guaranteed minimum input voltage for 1A output current is
1.10V, especially if cold temperature operation is required.
l
1
MAX
UNITS
4
40
µA
0.1
0.1
0.1
0.1
5
5
5
5
µA
µA
µA
µA
mA
Note 7: The LT3022 is tested and specified for these conditions with ADJ
tied to OUT. Specifications for fixed output voltage devices are referred to
the output voltage.
Note 8: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout the
output voltage equals: (VIN – VDROPOUT).
Note 9: The LT3022 is tested and specified for these conditions with
an external resistor divider (3.92k and 19.6k) setting VOUT to 1.2V. The
external resistor divider adds 50µA of load current.
Note 10: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.4V and a
current source load. GND pin current increases in dropout. See GND pin
current curves in the Typical Performance Characteristics section.
Note 11: Adjust pin bias current flows out of the ADJ pin.
Note 12: Shutdown pin current flows into the SHDN pin.
Note 13: The LT3022 is tested and specified for this condition with an
external resistor divider (3.92k and 5.9k) setting VOUT to 0.5V. The external
resistor divider adds 50µA of load current. The specification refers to
the change in the 0.2V reference voltage, not the 0.5V output voltage.
Specifications for fixed output voltage devices are referred to the output
voltage.
Note 14: Input reverse leakage current flows out of the IN pin.
Note 15: Reverse output current is tested with IN grounded and OUT
forced to the rated output voltage. This current flows into the OUT pin and
out of the GND pin.
Note 16: Reverse current is higher for the case of (rated_output)
< VOUT < VIN, because the no-load recovery circuitry is active in this region
and is trying to restore the output voltage to its nominal value.
3022fb
5
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
TYPICAL PERFORMANCE CHARACTERISTICS
VOUT = 1.2V
GUARANTEED DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
270
Guaranteed Dropout Voltage
300
240
210
TJ = 125°C
180
150
TJ = 25°C
120
90
TJ = –40°C
60
30
0
= TEST POINTS
270
240
270
TJ = 125°C
210
180
150
TJ = 25°C
120
90
60
IL = 1A
150
90
0.6
0.5
0.4
0.3
IL = 100mA
60
IL = 10mA
–25
50
25
0
75
TEMPERATURE (°C)
0.2
100
125
Output Voltage
1.236
IL = 1mA
IL = 1mA
1.224
OUTPUT VOLTAGE (V)
0.7
IL = 500mA
120
3022 G03
204
0.9
0.8
IL = 1A
180
ADJ Pin Voltage
206
ADJ PIN VOLTAGE (mV)
MINIMUM INPUT VOLTAGE (V)
210
3022 G02
Minimum Input Voltage
1.0
240
0
–50
0 100 200 300 400 500 600 700 800 900 1000
OUTPUT CURRENT (mA)
3022 G01
1.1
VOUT = 1.2V
30
30
0
0 100 200 300 400 500 600 700 800 900 1000
OUTPUT CURRENT (mA)
Dropout Voltage
300
DROPOUT VOLTAGE (mV)
Dropout Voltage
300
202
200
198
1.212
1.200
1.188
1.176
196
0.1
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
194
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
3022 G04
50
25
0
75
TEMPERATURE (°C)
100
125
3022 G05a
IL = 1mA
1.836
OUTPUT VOLTAGE (V)
1.530
OUTPUT VOLTAGE (V)
–25
Output Voltage
1.854
IL = 1mA
1.515
1.500
1.485
1.470
1.455
–50
1.164
–50
3022 G05
Output Voltage
1.545
125
1.818
1.800
1.782
1.764
–25
50
25
0
75
TEMPERATURE (°C)
100
125
3022 G05b
1.746
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
3022 G05c
3022fb
6
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current
90
900
80
800
70
60
50
40
30
20
10
VIN = 6V
VOUT = 1.2V
IL = 0
600
VSHDN = VIN
500
50
25
0
75
TEMPERATURE (°C)
–25
100
400
300
200
50
25
0
75
TEMPERATURE (°C)
–25
VSHDN = VIN
2.0
1.5
VSHDN = 0V
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
4.0
3.0
9
2.5
2.0
1.5
1.0
0
10
1
0
2
9
RL = 150Ω R = 1.5k
L
IL = 10mA I = 1mA
L
RL = 15Ω
IL = 100mA
6
3
0
1
2
8
9
10
RL = 1.2Ω
IL = 1A
15
12
RL = 2.4Ω
IL = 500mA RL = 120Ω
IL = 10mA
9
9
8
0
10
RL = 1.2k
IL = 1mA
RL = 12Ω
IL = 100mA
6
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
3022 G10
RL = 1.5Ω
IL = 1A
RL = 3Ω
IL = 500mA
3 4 5 6 7
INPUT VOLTAGE (V)
VOUT = 1.2V
TJ = 25°C
3
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3022 G11
24
VOUT = 1.5V
TJ = 25°C
12
2
GND Pin Current
21
15
1
18
VSHDN = 0V
GND Pin Current
24
18
0
21
VSHDN = VIN
0.5
8
VSHDN = 0V
24
3.5
3022 G09
0
1.0
3022 G08
VOUT = 1.8V
IL = 0
TJ = 25°C
4.5
3 4 5 6 7
INPUT VOLTAGE (V)
VOUT = 1.8V
TJ = 25°C
21
GND PIN CURRENT (mA)
0
1.5
0
GND PIN CURRENT (mA)
3.5
GND PIN CURRENT (mA)
QUIESCENT CURRENT (mA)
4.0
0.5
2.0
GND Pin Current
5.0
QUIESCENT CURRENT (mA)
VOUT = 1.5V
IL = 0
TJ = 25°C
VSHDN = VIN
2.5
Quiescent Current
4.5
1.0
3.0
3022 G07
Quiescent Current
5.0
2.5
3.5
125
100
3022 G06
3.0
4.0
0.5
VSHDN = 0V
0
–50
125
VOUT = 1.2V
IL = 0
TJ = 25°C
4.5
700
100
0
–50
Quiescent Current
5.0
QUIESCENT CURRENT (mA)
1000
QUIESCENT CURRENT (µA)
ADJ PIN BIAS CURRENT (nA)
ADJ Pin Bias Current
100
18
RL = 1.8Ω
IL = 1A
15
12
RL = 3.6Ω
IL = 500mA
9
6
9
10
3022 G12
0
RL = 1.8k
IL = 1mA
RL = 18Ω
IL = 100mA
3
8
RL = 180Ω
IL = 10mA
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3022 G13
3022fb
7
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
TYPICAL PERFORMANCE CHARACTERISTICS
GND Pin Current vs ILOAD
SHDN Pin Threshold
1.0
0.9
SHDN PIN THRESHOLD (V)
GND PIN CURRENT (mA)
VIN = 1.6V
21 VOUT = 1.2V
VSHDN = 10V
18 TJ = 25°C
15
12
9
6
3
0
SHDN Pin Input Current
5.0
IL = 1mA
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
–25
50
25
0
75
TEMPERATURE (°C)
100
3022 G14
2.7
4
3
2
1
100
1.5
1.2
0.9
–18
50
25
0
75
TEMPERATURE (°C)
100
–14
VIN = –10V
VOUT = 0V
VSHDN = 10V
100
VOUT = 0V
VSHDN = 10V
TJ = 25°C
–20
125
0
125
3022 G20
–1 –2 –3 –4 –5 –6 –7 –8 –9 –10
INPUT VOLTAGE (V)
3022 G19
Input Ripple Rejection
100
VIN = 0V
VOUT = 1.2V
IOUT FLOWS INTO OUT PIN
IIN FLOWS OUT OF IN PIN
90
INPUT RIPPLE REJECTION (dB)
–12
50
25
0
75
TEMPERATURE (°C)
–14
3022 G18
REVERSE OUTPUT CURRENT (µA)
INPUT CURRENT (µA)
–10
–25
–12
–16
100
80
60
40
20
0
–50 –25
10
–10
0.3
–25
9
–8
0.6
–2
–8
3 4 5 6 7 8
SHDN PIN VOLTAGE (V)
–6
Reverse Output Current
–6
2
–4
VIN = 1.7V
1.8
120
–4
1
0
–2
2.1
Reverse Input Leakage Current
–20
–50
1.0
Reverse Input Leakage Current
VIN = 10V
0
–50
125
0
–18
1.5
0
3022 G17
–16
2.0
3022 G16
VOUT = 0V
2.4
50
25
75
0
TEMPERATURE (°C)
2.5
0
125
INPUT CURRENT (µA)
VIN = 10V
VSHDN = 10V
0
–50 –25
3.0
Current Limit
3.0
CURRENT LIMIT (A)
SHDN PIN INPUT CURRENT (µA)
5
3.5
3022 G15
SHDN Pin Input Current
6
4.0
0.5
0
–50
0 100 200 300 400 500 600 700 800 900 1000
LOAD CURRENT (mA)
TJ = 25°C
4.5
SHDN PIN INPUT CURRENT (µA)
24
IOUT
50
25
75
0
TEMPERATURE (°C)
IIN
100
125
3022 G21
80
70
VIN = 1.5V + 50mVRMS RIPPLE
VOUT = 0.5V
IL = 1A
TJ = 25°C
COUT = 47µF
60
50
40
COUT = 10µF
30
20
10
0
10
100
1k
10k 100k
FREQUENCY (Hz)
1M
10M
3022 G22
3022fb
8
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
TYPICAL PERFORMANCE CHARACTERISTICS
Line Regulation
90
0.3
80
0.1
70
60
50
40
30
VIN = 1.5V + 0.5VP-P RIPPLE AT 120Hz
VOUT = 0.5V
COUT = 10µF
IL = 1A
20
10
0
–50
50
25
0
75
TEMPERATURE (°C)
–25
Load Regulation
1.0
∆VIN = 1.15V TO 10V
VOUT = 0.2V
IL = 1mA
–0.1
–0.3
–0.5
–0.7
–0.9
–1.1
–1.5
–50
125
–25
50
25
0
75
TEMPERATURE (°C)
100
3022 G23
15
10
8
IOUT(SINK) = 5mA
6
IOUT(SINK) = 1mA
4
2
5
20
0
–50 –25
50
25
75
0
TEMPERATURE (°C)
3022 G26
OUTPUT NOISE (µVRMS)
160
100
125
10
140
50
25
0
75
TEMPERATURE (°C)
100
125
VOUT = 1.2V
IL = 1A
TJ = 25°C
1
COUT = 10µF
0.1
COUT = 47µF
0.01
0.001
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
3022 G28
Start-Up from Shutdown
VOUT = 1.2V
COUT = 10µF
TJ = 25°C
–25
3022 G27
RMS Output Noise vs Load
Current (10Hz to 100kHz)
180
–0.6
3022 G25
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
OUTPUT OVERSHOOT (%)
OUTPUT SINK CURRENT (mA)
20
200
–0.4
Output Noise Spectral Density
10
5
10
15
OUTPUT OVERSHOOT (%)
0
–0.2
No-Load Recovery Threshold
TJ = 25°C
0
0.2
–1.0
–50
125
12
25
0
0.4
3022 G24
No-Load Recovery Threshold
30
0.6
–0.8
–1.3
100
VIN = 1.15V
VOUT = 0.5V
∆IL = 1mA TO 1A
LOAD REGULATION NUMBER REFERS
TO CHANGE IN THE 200mV REFERENCE
VOLTAGE
0.8
LOAD REGULATION (mV)
0.5
LINE REGULATION (mV)
INPUT RIPPLE REJECTION (dB)
Input Ripple Rejection
100
Transient Response
VOUT
0.5V/DIV
VOUT
50mV/DIV
VSHDN
1V/DIV
IOUT
500mA/DIV
120
100
80
60
40
20
0
0.01
0.1
1
10
100
LOAD CURRENT (mA)
1000
RL = 1.2Ω
VIN = 1.5V
VOUT = 1.2V
COUT = 10µF
50µs/DIV
3022 G30
50µs/DIV
VIN = 1.5V
VOUT = 1.2V
IOUT = 100mA to 1A
COUT = 22µF
tRISE = tFALL = 100ns
3022 G31
3022 G29
3022fb
9
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
PIN FUNCTIONS
NC (Pins 1, 2, 8, 15, 16): No Connect Pins. These pins
have no connection to internal circuitry. These pins may
be floated, tied to VIN or tied to GND for improved thermal
performance.
PGND (Pins 10, 11): Power Ground. The majority of
ground pin current flows out of PGND. Tie these pins
directly to AGND (Pins 6, 7) and the exposed backside
GND (Pin 17).
OUT (Pins 3, 4): These pins supply power to the load.
Use a minimum output capacitor of 10µF to prevent
oscillations. Large load transient applications require larger
output capacitors to limit peak voltage transients. See the
Applications Information section for more information on
output capacitance and reverse-output characteristics. The
LT3022 requires a 1mA minimum load current to ensure
proper regulation and stability.
IN (Pins 12, 13,14): These pins supply power to the device.
The LT3022 requires a bypass capacitor at IN if located
more than six inches from the main input filter capacitor.
Include a bypass capacitor in battery-powered circuits
as a battery’s output impedance rises with frequency. A
minimum bypass capacitor of 10µF suffices. The LT3022
withstands reverse voltages on the IN pin with respect to
ground and the OUT pin. In the case of a reversed input,
which occurs if a battery is plugged in backwards, the
LT3022 behaves as if a diode is in series with its input.
No reverse current flows into the LT3022 and no reverse
voltage appears at the load. The device protects itself and
the load.
SENSE (Pin 5, Fixed Voltage Device Only): This pin is
the sense point for the internal resistor divider. It should
be tied directly to the OUT pins for best results.
ADJ (Pin 5): This pin is the error amplifier inverting
terminal. Its 30nA typical input bias current flows out of
the pin (see curve of ADJ Pin Bias Current vs Temperature
in the Typical Performance Characteristics). The ADJ pin
reference voltage is 200mV (referred to AGND).
AGND (Pins 6, 7): Analog Ground. Tie these pins directly
to PGND (Pins 10, 11) and the exposed backside GND
(Pin 17). Connect the bottom of the external resistor
divider, setting output voltage, directly to AGND for
optimum regulation.
GND (Pin 17): Exposed Pad. Tie this pin directly to AGND
(Pins 6, 7), PGND (Pins 10, 11) and the PCB ground.
This pin provides enhanced thermal performance with
its connection to the PCB ground. See the Applications
Information section for thermal considerations and
calculating junction temperature.
SHDN (Pin 9): Pulling the SHDN pin low puts the LT3022
into a low power state and turns the output off. Drive the
SHDN pin with either logic or an open-collector/drain device
with a pull-up resistor. The resistor supplies the pull-up
current to the open collector/drain logic, normally several
microamperes, and the SHDN pin current, typically 3µA.
If unused, connect the SHDN pin to VIN. The LT3022 does
not function if the SHDN pin is not connected.
3022fb
10
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
BLOCK DIAGRAM
9
SHDN
IN
THERMAL
SHUTDOWN
SHUTDOWN
R3
D1
–
200mV
BIAS CURRENT
AND
REFERENCE
GENERATOR
213mV
ERROR
AMP
+
Q3
CURRENT
GAIN
Q1
PGND
OUT
10, 11
3, 4
D2
–
NO-LOAD
RECOVERY
Q2
+
NOTE:
FOR LT3022 ADJ PIN (5) IS
CONNECTED TO THE ADJ PIN,
R1 AND R2 ARE EXTERNAL.
FOR LT3022-1.X PIN (5) IS
CONNECTED TO THE SENSE PIN,
R1 AND R2 ARE INTERNAL.
TIE PGND, AGND AND THE EXPOSED
PAD TOGETHER.
12, 13, 14
SENSE
R2
25k
IDEAL
DIODE
FIXED
VOUT
1.2V
1.5V
1.8V
5
ADJ
5
R1
R1
AGND
R2
3.92k 19.6k
3.92k 25.5k
3.92k 31.4k
6, 7
3022 BD
3022fb
11
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
APPLICATIONS INFORMATION
The LT3022 very low dropout linear regulator is capable of
0.9V input supply operation. It supplies 1A output current
and dropout voltage is typically 145mV. Quiescent current
is typically 400µA and drops to 7.5µA in shutdown. The
LT3022 incorporates several protection features, making
it ideal for use in battery-powered systems. The device
protects itself against reverse-input and reverse-output
voltages. If the output is held up by a backup battery when
the input is pulled to ground in a battery backup application,
the LT3022 behaves as if a diode is in series with its output,
preventing reverse current flow. In dual supply applications
where the regulator load is returned to a negative supply,
pulling the output below ground by as much as 10V does
not affect start-up or normal operation.
Adjustable Operation
The LT3022’s output voltage range is 0.2V to 9.5V. Figure 1
shows that the external resistor ratio sets output voltage.
The device regulates the output to maintain ADJ at 200mV
referred to ground. R1’s current equals 200mV/R1. R2’s
current is R1’s current minus the ADJ pin bias current.
The 30nA ADJ pin bias current flows out of the pin. Use
Figure 1’s formula to calculate output voltage. Given the
LT3022’s 1mA minimum load current requirement, Linear
Technology recommends choosing resistor divider values
to satisfy this requirement. A 200Ω R1 value sets a 1mA
resistor divider current. In shutdown, the output is off and
the divider current is zero. Curves of ADJ Pin Voltage vs
Temperature and ADJ Pin Bias Current vs Temperature appear
in the Typical Performance Characteristics section.
Specifications for output voltages greater than 200mV
are proportional to the ratio of desired output voltage to
200mV (VOUT/200mV). For example, load regulation for
an output current change of 1mA to 1A is typically 100µV
at VADJ = 200mV. At VOUT = 1.5V, load regulation is:
1.5V
• 100µV = 750 µV
200mV
Table 1 shows 1% resistor divider values for some common
output voltages with a resistor divider current equaling or
about 1mA.
Table 1
VOUT (V)
R1 (Ω)
R2 (Ω)
0.9
200
698
1.0
187
750
1.2
200
1000
1.5
200
1300
1.8
187
1500
2.5
187
2150
3.3
200
3090
+
VOUT
OUT
IN
VIN
LT3022
SHDN
R2
ADJ
GND
R1
3022 F01
VOUT: 200mV • (1 + R2/R1) – (IADJ • R2)
VADJ: 200mV
IADJ: 30nA AT 25°C
OUTPUT RANGE: 0.2V TO 9.5V
Figure 1. Adjustable Operation
Output Capacitance and Transient Response
The LT3022’s design is stable with a wide range of output
capacitors, but is optimized for low ESR ceramic capacitors.
The output capacitor’s ESR affects stability, most notably
with small value capacitors. Use a minimum output
capacitor of 10µF with an ESR of less than 0.1Ω to prevent
oscillations. The LT3022 is a low voltage device and output
load transient response is a function of output capacitance.
Larger values of output capacitance decrease the peak
deviations and provide improved transient response for
large load current changes.
Ceramic capacitors require extra consideration. Manufac­
turers make ceramic capacitors with a variety of dielectrics;
each with a different behavior across temperature and
applied voltage. The most common dielectrics are Z5U,
Y5V, X5R and X7R. Z5U and Y5V dielectrics provide
high C-V products in a small package at low cost, but
exhibit strong voltage and temperature coefficients. X5R
and X7R dielectrics yield highly stable characteristics
3022fb
12
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
APPLICATIONS INFORMATION
and are more suitable for use as the output capacitor at
fractionally increased cost. X5R and X7R dielectrics both
exhibit excellent voltage coefficient characteristics. X7R
works over a larger temperature range and exhibits better
temperature stability whereas X5R is less expensive and
is available in higher values. Figures 2 and 3 show voltage
coefficient and temperature coefficient comparisons
between Y5V and X5R material.
20
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10µF
0
CHANGE IN VALUE (%)
X5R
–20
Voltage and temperature coefficients are not the only
sources of problems. Some ceramic capacitors have a
piezoelectric response. A piezoelectric device generates
voltage across its terminals due to mechanical stress,
similar to the way a piezoelectric accelerometer or
microphone works. For a ceramic capacitor, the stress can
be induced by vibrations in the system or thermal transients.
The resulting voltages produced can cause appreciable
amounts of noise. A ceramic capacitor produced Figure 4’s
trace in response to light tapping from a pencil. Similar
vibration induced behavior can masquerade as increased
output voltage noise.
–40
–60
Y5V
–80
–100
1mV/DIV
0
2
4
8
6
10 12
DC BIAS VOLTAGE (V)
14
16
3022 F02
Figure 2. Ceramic Capacitor DC Bias Characteristics
VOUT = 1.3V
COUT = 10µF
ILOAD = 0
1ms/DIV
3022 F04
40
Figure 4. Noise Resulting from Tapping on a Ceramic Capacitor
CHANGE IN VALUE (%)
20
X5R
0
No-Load/Light-Load Recovery
–20
–40
Y5V
–60
–80
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10µF
–100
50
25
75
–50 –25
0
TEMPERATURE (°C)
100
125
3022 F03
Figure 3. Ceramic Capacitor Temperature Characteristics
A possible transient load step that occurs is where the
output current changes from its maximum level to zero
current or a very small load current. The output voltage
responds by overshooting until the regulator lowers the
amount of current it delivers to the new level. The regulator
loop response time and the amount of output capacitance
control the amount of overshoot. Once the regulator has
decreased its output current, the current provided by
the resistor divider (which sets VOUT) is the only current
remaining to discharge the output capacitor from the level
to which it overshot. The amount of time it takes for the
output voltage to recover easily extends to milliseconds
with minimum divider current and many microfarads of
output capacitance.
3022fb
13
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
APPLICATIONS INFORMATION
To eliminate this problem, the LT3022 incorporates a
no-load or light load recovery circuit. This circuit is a
voltage-controlled current sink that significantly improves
the light load transient response time by discharging the
output capacitor quickly and then turning off. The current
sink turns on when the output voltage exceeds 6.5% of
the nominal output voltage. The current sink level is then
proportional to the overdrive above the threshold up to a
maximum of about 24mA. Consult the curve in the Typical
Performance Characteristics for the No-Load Recovery
Threshold.
If external circuitry forces the output above the no-load
recovery circuit’s threshold, the current sink turns on in
an attempt to restore the output voltage to nominal. The
current sink remains on until the external circuitry releases
the output. However, if the external circuitry pulls the output
voltage above the input voltage or the input falls below the
output, the LT3022 turns the current sink off and shuts
down the bias current/reference generator circuitry.
Thermal Considerations
The LT3022’s maximum rated junction temperature of
125°C limits its power handling capability. Two components
comprise the power dissipation of the device:
1. Output current multiplied by the input-to-output voltage
differential:
(ILOAD) • (VIN – VOUT) and
2. GND pin current multiplied by the input voltage:
(IGND) • (VIN)
GND pin current is found by examining the GND pin current
curves in the Typical Performance Characteristics. Power
dissipation equals the sum of the two components listed.
The LT3022’s internal thermal limiting (with hysteresis)
protects the device during overload conditions. For normal
continuous conditions, do not exceed the maximum
junction temperature rating of 125°C. Carefully consider
all sources of thermal resistance from junction to ambient
including other heat sources mounted in proximity to the
LT3022.
The underside of the LT3022 DHC and MSE packages has
exposed metal from the lead frame to the die attachment.
Heat transfers directly from the die junction to the
printed circuit board metal, allowing maximum junction
temperature control. The dual-in-line pin arrangement
allows metal to extend beyond the ends of the package
on the topside (component side) of a PCB. Connect this
metal to GND on the PCB. The multiple IN and OUT pins
of the LT3022 also assist in spreading heat to the PCB.
Copper board stiffeners and plated throughholes can also
be used to spread the heat generated by power devices.
The following tables list thermal resistance as a function
of copper area in a fixed board size. All measurements are
taken in still air on a 4-layer FR-4 board with 1oz solid
internal planes, and 2oz external trace planes with a total
board thickness of 1.6mm. For more information on thermal
resistance and high thermal conductivity test boards,
refer to JEDEC standard JESD51, notably JESD51-12 and
JESD51-7. Achieving low thermal resistance necessitates
attention to detail and careful PCB layout.
Table 2. Measured Thermal Resistance for DHC Package
COPPER AREA
TOPSIDE*
BACKSIDE
BOARD AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
2500mm2
2500mm2
2500mm2
35°C/W
1000mm2
2500mm2
2500mm2
37°C/W
225mm2
2500mm2
2500mm2
38°C/W
100mm2
2500mm2
2500mm2
40°C/W
*Device is mounted on topside
Table 3. Measured Thermal Resistance for MSE Package
COPPER AREA
TOPSIDE*
BACKSIDE
BOARD AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
2500mm2
2500mm2
2500mm2
35°C/W
1000mm2
2500mm2
2500mm2
37°C/W
225mm2
2500mm2
2500mm2
38°C/W
100mm2
2500mm2
2500mm2
40°C/W
*Device is mounted on topside.
3022fb
14
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
APPLICATIONS INFORMATION
Calculating Junction Temperature
Example: Given an output voltage of 1.5V, an input voltage
range of 1.7V to 1.9V, an output load current range of 1mA
to 1A and a maximum ambient temperature of 85°C, what
is the maximum junction temperature for an application
using the DHC package?
The power dissipated by the device equals:
ILOAD(MAX) • (VIN(MAX) – VOUT) + IGND • (VIN(MAX))
where:
ILOAD(MAX) = 1A
VIN(MAX) = 1.9V
IGND at (ILOAD = 1A, VIN = 1.9V) = 18mA
so:
P = 1A • (1.9V – 1.5V) + 18mA • (1.9V) = 0.434W
The thermal resistance is about 38°C/W depending on
the copper area. So the junction temperature rise above
ambient is approximately equal to:
0.434W • (38°C/W) = 16.5°C
The maximum junction temperature equals the maximum
junction temperature rise above ambient plus the maximum
ambient temperature or:
TJMAX = 85°C + 16.5°C = 101.5°C
Protection Features
The LT3022 incorporates several protection features
that make it ideal for use in battery-powered circuits. In
addition to the normal protection features associated with
monolithic regulators, such as current limiting and thermal
limiting, the device also protects against reverse-input
voltages, reverse-output voltages and reverse output-toinput voltages.
Current limit protection and thermal overload protection
protect the device against current overload conditions at its
output. For normal operation, do not exceed 125°C junction
temperature. The typical thermal shutdown temperature
is 165°C and the thermal shutdown circuit incorporates
about 7°C of hysteresis.
The IN pins withstand reverse voltages of 10V. The LT3022
limits current flow to less than 1µA and no negative voltage
appears at OUT . The device protects both itself and the
load against batteries that are plugged in backwards.
The LT3022 incurs no damage if OUT is pulled below
ground. If IN is left open-circuited or grounded, OUT can
be pulled below ground by 10V. No current flows from
the pass transistor connected to OUT. However, current
flows in (but is limited by) the resistor divider that sets the
output voltage. Current flows from the bottom resistor in
the divider and from the ADJ pin’s internal clamp through
the top resistor in the divider to the external circuitry pulling
OUT below ground. If IN is powered by a voltage source,
OUT sources current equal to its current limit capability
and the LT3022 protects itself by thermal limiting. In this
case, grounding SHDN turns off the LT3022 and stops
OUT from sourcing current.
The LT3022 incurs no damage if the ADJ pin is pulled
above or below ground by 10V. If IN is left open-circuited
or grounded and ADJ is pulled above ground, ADJ acts
like a 25k resistor in series with two diodes. ADJ acts like
a 25k resistor if pulled below ground. If IN is powered by a
voltage source and ADJ is pulled below its reference voltage,
the LT3022 attempts to source its current limit capability
at OUT. The output voltage increases to VIN – VDROPOUT
with VDROPOUT set by whatever load current the LT3022
supports. This condition can potentially damage external
circuitry powered by the LT3022 if the output voltage
increases to an unregulated high voltage. If IN is powered
by a voltage source and ADJ is pulled above its reference
voltage, two situations can occur. If ADJ is pulled slightly
above its reference voltage, the LT3022 turns off the pass
transistor, no output current is sourced and the output
voltage decreases to either the voltage at ADJ or less. If
ADJ is pulled above its no-load recovery threshold, the
no-load recovery circuitry turns on and attempts to sink
current. OUT is actively pulled low and the output voltage
clamps at a Schottky diode above ground. Please note that
the behavior described above applies to the LT3022 only. If
a resistor divider is connected under the same conditions,
there will be additional V/R current.
3022fb
15
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
APPLICATIONS INFORMATION
In circuits where a backup battery is required, several
different input/output conditions can occur. The output
voltage may be held up while the input is either pulled to
ground, pulled to some intermediate voltage or is left open
circuit. In the case where the input is grounded, there is
less than 1µA of reverse output current. If the LT3022 IN
pin is forced below the OUT pin or the OUT pin is pulled
above the IN pin, input current drops to less than 10µA
typically. This occurs if the LT3022 input is connected to
a discharged (low voltage) battery and either a backup
battery or a second regulator circuit holds up the output.
The state of the SHDN pin has no effect on the reverse
output current if OUT is pulled above IN.
Input Capacitance and Stability
The LT3022 design is stable with a minimum of 10µF
capacitor placed at the IN pin. Very low ESR ceramic
capacitors may be used. However, in cases where long
wires connect the power supply to the LT3022’s input and
ground, use of low value input capacitors combined with
an output load current of greater than 20mA may result
in instability. The resonant LC tank circuit formed by the
wire inductance and the input capacitor is the cause and
not a result of LT3022 instability.
The self-inductance, or isolated inductance, of a wire
is directly proportional to its length. However, the wire
diameter has less influence on its self inductance. For
example, the self-inductance of a 2-AWG isolated wire
with a diameter of 0.26" is about half the inductance of a
30-AWG wire with a diameter of 0.01". One foot of 30-AWG
wire has 465nH of self-inductance.
Several methods exist to reduce a wire’s self-inductance.
One method divides the current flowing towards the
LT3022 between two parallel conductors. In this case,
placing the wires further apart reduces the inductance;
up to a 50% reduction when placed only a few inches
apart. Splitting the wires connects two equal inductors
in parallel. However, when placed in close proximity to
each other, mutual inductance adds to the overall self
inductance of the wires. The most effective technique to
reducing overall inductance is to place the forward and
return current conductors (the input wire and the ground
wire) in close proximity. Two 30-AWG wires separated by
0.02" reduce the overall self-inductance to about one-fifth
of a single wire.
If a battery, mounted in close proximity, powers the LT3022,
a 10µF input capacitor suffices for stability. However,
if a distantly located supply powers the LT3022, use a
larger value input capacitor. Use a rough guideline of 1µF
(in addition to the 10µF minimum) per 8 inches of wire
length. The minimum input capacitance needed to stabilize
the application also varies with power supply output
impedance variations. Placing additional capacitance on
the LT3022’s output also helps. However, this requires
an order of magnitude more capacitance in comparison
with additional LT3022 input bypassing. Series resistance
between the supply and the LT3022 input also helps stabilize
the application; as little as 0.1Ω to 0.5Ω suffices. This
impedance dampens the LC tank circuit at the expense of
dropout voltage. A better alternative is to use higher ESR
tantalum or electrolytic capacitors at the LT3022 input in
place of ceramic capacitors.
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16
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
PACKAGE DESCRIPTION
DHC Package
16-Lead Plastic DFN (5mm × 3mm)
(Reference LTC DWG # 05-08-1706)
0.65 ±0.05
3.50 ±0.05
1.65 ±0.05
2.20 ±0.05 (2 SIDES)
PACKAGE
OUTLINE
0.25 ± 0.05
0.50 BSC
4.40 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
5.00 ±0.10
(2 SIDES)
R = 0.20
TYP
3.00 ±0.10
(2 SIDES)
9
R = 0.115
TYP
0.40 ± 0.10
16
1.65 ± 0.10
(2 SIDES)
PIN 1
TOP MARK
(SEE NOTE 6)
PIN 1
NOTCH
0.200 REF
0.75 ±0.05
0.00 – 0.05
8
1
0.25 ± 0.05
0.50 BSC
(DHC16) DFN 1103
4.40 ±0.10
(2 SIDES)
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC
PACKAGE OUTLINE MO-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
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17
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
PACKAGE DESCRIPTION
MSE Package
16-Lead Plastic MSOP, Exposed Die Pad
(Reference LTC DWG # 05-08-1667 Rev E)
BOTTOM VIEW OF
EXPOSED PAD OPTION
2.845 ± 0.102
(.112 ± .004)
5.23
(.206)
MIN
2.845 ± 0.102
(.112 ± .004)
0.889 ± 0.127
(.035 ± .005)
8
1
1.651 ± 0.102
(.065 ± .004)
1.651 ± 0.102 3.20 – 3.45
(.065 ± .004) (.126 – .136)
0.305 ± 0.038
(.0120 ± .0015)
TYP
16
0.50
(.0197)
BSC
4.039 ± 0.102
(.159 ± .004)
(NOTE 3)
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
0.35
REF
0.12 REF
DETAIL “B”
CORNER TAIL IS PART OF
DETAIL “B” THE LEADFRAME FEATURE.
FOR REFERENCE ONLY
9
NO MEASUREMENT PURPOSE
0.280 ± 0.076
(.011 ± .003)
REF
16151413121110 9
DETAIL “A”
0° – 6° TYP
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4.90 ± 0.152
(.193 ± .006)
GAUGE PLANE
0.53 ± 0.152
(.021 ± .006)
DETAIL “A”
1.10
(.043)
MAX
0.18
(.007)
SEATING
PLANE
0.17 – 0.27
(.007 – .011)
TYP
1234567 8
0.50
(.0197)
BSC
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
6. EXPOSED PAD DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH ON E-PAD SHALL
NOT EXCEED 0.254mm (.010") PER SIDE.
0.86
(.034)
REF
0.1016 ± 0.0508
(.004 ± .002)
MSOP (MSE16) 0911 REV E
3022fb
18
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
REVISION HISTORY
REV
DATE
DESCRIPTION
PAGE NUMBER
A
9/10
Added -1.2, -1.5, and -1.8 fixed voltage options
B
02/12
Revised Max value for Input Reverse Leakage Current
5
Updated the 16-lead MSE package
18
1 to 6, 10, 20
3022fb
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
19
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
TYPICAL APPLICATION
1.5V to 1.2V, 1A VLDO Regulator
VIN
1.5V
IN
10µF
VOUT
1.2V
10µF 1A
OUT
LT3022-1.2
RLD
1.2K*
SHDN SENSE
GND
3022 TA02
*RLD: OPTIONAL (TO SATISFY 1mA MINIMUM LOAD CURRENT REQUIREMENT)
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT3020
100mA, Low Voltage VLDO Linear Regulator
VIN: 0.9V to 10V, VOUT : 0.2V to 9.5V, VDO = 0.15V, IQ = 120µA,
Noise: <250µVRMS, Stable with 2.2µF Ceramic Capacitors, DFN-8,
MS8 Packages
LT3021
500mA, Low Voltage, VLDO Linear Regulator
VIN: 0.9V to 10V, Dropout Voltage: 160mV Typical, Adjustable Output
(VREF = VOUT(MIN) = 200mV), Fixed Output Voltages: 1.2V, 1.5V, 1.8V, Stable
with Low ESR, Ceramic Output Capacitors, 16-Pin DFN (5mm × 5mm) and
8-Lead SO Packages
LTC®3025
300mA Micropower VLDO Linear Regulator
VIN = 0.9V to 5.5V, Dropout Voltage: 45mV, Low Noise 80µVRMS,
Low IQ: 54µA, 2mm × 2mm 6-Lead DFN Package
LTC3025-1/LTC3025-2/
LTC3025-3/LTC3025-4
500mA Micropower VLDO Linear Regulator in
2mm × 2mm DFN
VIN = 0.9V to 5.5V, Dropout Voltage: 75mV, Low Noise 80µVRMS,
Low IQ: 54µA, Fixed Output: 1.2V (LTC3025-2), 1.5V (LTC3025-3),
1.8V (LTC3025-4); Adjustable Output Range: 0.4V to 3.6V (LTC3025-1),
2mm × 2mm 6-Lead DFN Package
LTC3026
1.5A, Low Input Voltage VLDO Linear Regulator
VIN: 1.14V to 3.5V (Boost Enabled), 1.14V to 5.5V (with External 5V),
VDO = 0.1V, IQ = 950µA, Stable with 10µF Ceramic Capacitors, 10-Lead
eMSOP and DFN-10 Packages
LT3029
Dual 500mA/500mA, Low Dropout, Low Noise,
Micropower Linear Regulator
Output Current: 500mA per Channel, Low Dropout Voltage: 300mV Low
Noise: 20µVRMS (10Hz to 100kHz), Low Quiescent Current: 55µA per Channel,
Wide Input Voltage Range: 1.8V to 20V (Common or Independent Input
Supply), Adjustable Output: 1.215V Reference, Very Low Quiescent Current
in Shutdown: <1µA per Channel Stable with 3.3µF Minimum Output Capacitor,
Stable with Ceramic, Tantalum or Aluminum Electrolytic Capacitors, ReverseBattery, and Reverse Output-to-Input Protection, Thermally Enhanced 16-Lead
eMSOP and 16-Lead (4mm × 3mm) DFN Packages
LTC3035
300mA VLDO Linear Regulator with Charge
Pump Bias Generator
VIN = 1.7V to 5.5V, VOUT : 0.4V to 3.6V, Dropout Voltage: 45mV, IQ: 100µA,
3mm × 2mm DFN-8
LT3080/LT3080-1
1.1A, Parallelable, Low Noise, Low Dropout
Linear Regulator
300mV Dropout Voltage (2-Supply Operation), Low Noise: 40µVRMS,
VIN: 1.2V to 36V, VOUT : 0V to 35.7V, Current-Based Reference with 1-Resistor
VOUT Set; Directly Parallelable (No Op Amp Required), Stable with Ceramic
Capacitors, TO-220, SOT-223, eMSOP-8 and 3mm × 3mm DFN-8 Packages;
LT3080-1 Has Integrated Internal Ballast Resistor
LT3085
500mA, Parallelable, Low Noise, Low Dropout
Linear Regulator
275mV Dropout Voltage (2-Supply Operation), Low Noise: 40µVRMS,
VIN: 1.2V to 36V, VOUT : 0V to 35.7V, Current-Based Reference with 1-Resistor
VOUT Set; Directly Parallelable (No Op Amp Required), Stable with Ceramic
Capacitors, eMSOP-8 and 2mm × 3mm DFN-6 packages
3022fb
20 Linear Technology Corporation
LT 0212 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2010