LTP3558
P-1
General Description
The LTP3558 is a high voltage, low power consumption and high performance LDO. The family uses
an advanced CMOS process and a P-MOSFET pass device to achieve fast start-up, with high output
voltage accuracy. The LTP3558 is stable with a 1.0μF~10μF ceramic output capacitor, and uses a
precision voltage reference and feedback loop to achieve a worst-case accuracy of 2% over all
load, line, process, and temperature variations.
Features
Wide Input Voltage Range: up to 36V
Output Current: 200mA
Standard Fixed Output Voltage Options: 1.8V, 2.5V, 3.0V, 3.3V, 3.6V, and 5.0V
Other Output Voltage Options Available on Request
Low IQ: 1.5µA
Low Dropout Voltage
Short current protection: 100mA
Excellent Load and Line Transient Response
Line Regulation: 0.01%/V Typically
Available Packages:
Order Information
Model
LTP3558
Package
Ordering Number Note1
Packing Option
SOT23-3L
LTP3558-xxXT3
Tape and Reel, 3000
SOT23-5L
LTP3558-xxXT5
Tape and Reel, 3000
DFN1x1-4L
LTP3558-xxXF4
Tape and Reel, 10000
SOT89-3
LTP3558-xxXT4
Tape and Reel, 1000
Notel: xx stands for output voltage, e.g. if xx = 18, the output voltage is 1.8V; if xx = 30, the output voltage is 3.0V.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
LTP3558
P-2
Pin Configuration
3 IN
1
GND
2
IN
GND
3
OUT
OUT
1
SOT23-3L
SOT89-3
IN
1
GND
2
NC
3
2
5
OUT
4
NC
SOT23-5L
OUT
NC
4
3
1
2
IN
GND
DFN1×1-4L
TOP VIEW
Pin Function
Pin No.
Pin Name
Pin Function
1
GND
Ground.
2
3
IN
Supply input pin. Must be closely decoupled to GND with a 1μF
or greater ceramic capacitor.
3
2
OUT
Output pin. Bypass a 1μF or greater ceramic capacitor from this
pin to ground.
SOT-89
SOT23-3L
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
LTP3558
P-3
Pin No.
Pin Name
Pin Function
1
IN
Supply input pin. Must be closely decoupled to GND with a 1μF
or greater ceramic capacitor.
2
2
GND
Ground.
3
3
NC
No connection.
NC
No connection.
OUT
Output pin. Bypass a 1μF or greater ceramic capacitor from
this pin to ground.
SOT23-5L
DFN1x1-4L
1
4
5
4
Block Diagram
OUT
IN
Short
Current protection
+
Voltage
Reference
GND
Functional Description
Input Capacitor
A 1μF-10μF ceramic capacitor is recommended to connect between Vin and GND pins to decouple input power
supply glitch and noise. The amount of the capacitance may be increased without limit. This input capacitor must
be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide
copper trace is required for both Vin and GND.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
P-4
LTP3558
Output Capacitor
An output capacitor is required for the stability of the LDO. The recommended output capacitance is from 1μF to
10μF, Equivalent Series Resistance (ESR) is from 5mΩ to 100mΩ, and temperature characteristics are X7R or
X5R. Higher capacitance values help to improve load/line transient response. The output capacitance may be
increased to keep low undershoot/overshoot. Place output capacitor as close as possible to OUT and GND pins.
Low Quiescent Current
The LTP3558, consuming only around 1.5μA for all input range and output loading, provides great power saving
in portable and low power applications.
Short Current Limit Protection
When output current at the OUT pin is higher than current limit threshold or the OUT pin is short-circuit to GND,
the short current limit protection will be triggered and clamp the output current to approximately 100mA to
prevent over-current and to protect the regulator from damage due to overheating.
Absolute Maximum Ratings
Parameter
Rating
IN pin to GND pin
-0.3 to 40
V
OUT pin to GND pin
-0.3 to 6
V
Thermal Resistance (Junction to Ambient)
Unit
SOT23-3L
360
SOT23-5L
250
DFN1X1-4L
180
SOT-89
135
°
C/W
Operating Junction Temperature
-40 to 125
°
C
Storage Temperature
-65 to 150
°
C
Lead Temperature (Soldering, 10 sec)
300
°
C
ESD (HBM mode)
ESDA/JEDEC
JS-001-2017
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
±2000V
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
LTP3558
P-5
Electrical Characteristics
(VIN= VOUT+2V, Ta= 25°C, CIN=10uF, COUT=10uF unless otherwise noted)
PARAMETER
SYMBOL
Input Voltage Operation Range
VIN
Dropout Voltage
VDROP
DC Supply Quiescent Current
IQ
Regulated Output Voltage
VOUT
Output Voltage Line Regulation RegLINE
TEST CONDITIONS
MIN
TYP
VOUT= 5V, IOUT = 150mA
720
VOUT= 5V, IOUT = 100mA
420
VOUT= 3.3 V, IOUT = 150mA
820
VOUT= 3.3 V, IOUT = 100mA
520
1.5
IOUT=1mA
VOUT X 0.98
MAX
UNIT
36
V
mV
3
µA
VQUTX1.02 V
VIN = VOUT +1V to 30V,
IOUT = 10mA
(△VOUT/△VIN/VOUT)
0.01
0.04
%/V
IOUT from 1mA to 150mA
VIN=VOUT+2V
5
20
mV
IOUT from 1mA to 150mA
VIN=10V
25
60
mV
Output Voltage Load
Regulation
RegLOAD
Maximum Output Current
IOUT
VIN = VOUT +1V
Short Current Protection
ISHORT
OUT short to GND
100
mA
Output Noise
eN
10Hz to 100kHz,
IOUT = 30mA,
90
µVRMS
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
200
mA
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
P-6
LTP3558
TYPICAL PERFORMANCE CHARACTERISTICS
Fig1. Line-Transient Response
Fig2.Load-Transient Response
Fig3.StartupResponse
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
LTP3558
P-7
VDROP VS. IOUT
IQ VS. Temperature
10
3
1
2
IQ (μA)
Dropout Voltage(V)
2.5
0.1
1.5
1
0.5
0
0.01
0
40
80
120
160
200
-40 -20
20 40 60 80 100 120
Temperature(℃)
Output Current (mA)
Fig4. Dropout Voltage VS Output Current
0
Fig5. DC Supply Quiescent Current VS Temperature
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
LTP3558
P-8
Application Circuits
VIN
IN
OUT
1µF to 10µF
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
VOUT
1µF to 10µF
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
LTP3558
P-9
Package Dimension
DFN1x1-4L
0.65BSC
0.95~1.05
0.45~0.55
0.95~1.05
0.125REF
0.15~0.35
0.00~0.05
Unit:mm
PIN1
SOT23-3L
2.82~3.02
0.3~0.6
0.7
1.5~1.7
2.6~3.0
0.3~0.4
0.95
0.1~0.2
1.05~1.25
0.1max
1.8~2.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
Unit:mm
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs
LTP3558
P-10
SOT23-5L
2.82~3.02
0.3~0.6
0.7
1.6~1.7
2.6~3.0
0.35~0.5
0.95
0.08~0.2
1.05~1.25
0.1max
1.8~2.0
Unit:mm
SOT-89
4.4~4.6
1.4~1.6
0.9~1.2
2.3~2.6
3.94~4.25
1.55
1.50
0.32~0.52
3.00
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Linearin and designs are registered trademarks of Linearin Technology Corporation.
© Copyright Linearin Technology Corporation. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
0.35~0.44
Unit:mm
FN1620-2L.1a — Data Sheet
36V Input Voltage, 200-mA, Ultra-low IQ LDOs