LTP3558A
P-1
General Description
The LTP3558A 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 LTP3558A is stable with a 1.0 μF to 10 μF ceramic output capacitor, and
uses a precision voltage reference and feedback loop to achieve a worst-case accuracy of 1% over
all load, line, process, and temperature variations.
Features
Wide Input Voltage Range: up to 36 V
Output Current: 200 mA
Standard Fixed Output Voltage Options: 3.3 V, 5.0 V
Other Output Voltage Options Available on Request
Low IQ: 1.5 µA
Low Dropout Voltage
Short current protection: 100 mA
Excellent Load and Line Transient Response
Line Regulation: 0.01%/V Typically
Available Packages: SOT89-3
Order Information
Model
LTP3558A
Package
Ordering Number Note1
Packing Option
SOT89-3
LTP3558A-xxXT4
Tape and Reel, 1000
SOT89-3
LTP3558A-xxRXT4
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.
FN1622-CD.0 — Data Sheet
36 V Input Voltage, 200 mA, Ultra-low IQ LDOs
LTP3558A
P-2
Pin Configuration
1
GND
2
IN
3
OUT
1
OUT
SOT89-3
2
GND
3
IN
SOT89-3
Pin Function
Pin No.
Pin Name
Pin Function
2
GND
Ground.
2
3
IN
Supply input pin. Must be closely decoupled to GND with a 1 μF
or greater ceramic capacitor.
3
1
OUT
Output pin. Bypass a 1 μF or greater ceramic capacitor from
this pin to ground.
SOT89-3
SOT89-3
1
Block Diagram
OUT
IN
Short
Current protection
+
Voltage
Reference
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.
FN1622-CD.0 — Data Sheet
36 V Input Voltage, 200 mA, Ultra-low IQ LDOs
P-3
LTP3558A
Functional Description
Input Capacitor
A 1 μF to 10 μF 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.
Output Capacitor
An output capacitor is required for the stability of the LDO. The recommended output capacitance is from 1 μF to
10 μF, Equivalent Series Resistance (ESR) is from 5 mΩ to 100 mΩ, 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 LTP3558A, consuming only around 1.5 μA 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)
SOT89-3
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.
Unit
135
°
C/W
±2000V
FN1622-CD.0 — Data Sheet
36 V Input Voltage, 200 mA, Ultra-low IQ LDOs
LTP3558A
P-4
Electrical Characteristics
(VIN = VOUT +2 V, Ta = 25°C, CIN = 10 μF, COUT = 10 μF, 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
Max
36
VOUT= 5.0 V, IOUT = 150 mA
720
VOUT= 5.0 V, IOUT = 100 mA
420
VOUT= 3.3 V, IOUT = 150 mA
820
VOUT= 3.3 V, IOUT = 100 mA
520
1.5
IOUT =1 mA
VOUT X 0.99
VIN = VOUT +1 V to 30 V,
IOUT = 10 mA
IOUT from 1 mA to 150 mA
VIN = VOUT + 2 V
Unit
V
mV
3
µA
VOUT X 1.01
V
0.01
0.04
%
5
20
mV
25
60
mV
Output Voltage Load
Regulation
RegLOAD
Maximum Output Current
IOUT
VIN = VOUT +2 V
Short Current Protection
ISHORT
OUT short to GND
100
mA
Output Noise
eN
10 Hz to 100 kHz,
IOUT = 30 mA,
90
µVRMS
IOUT from 1 mA to 150 mA
VIN = 10 V
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
FN1622-CD.0 — Data Sheet
36 V Input Voltage, 200 mA, Ultra-low IQ LDOs
P-5
LTP3558A
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.
FN1622-CD.0 — Data Sheet
36 V Input Voltage, 200 mA, Ultra-low IQ LDOs
LTP3558A
P-6
VDROP VS. IOUT
10
IQ VS. Temperature
3
1
2
IQ (μA)
Dropout Voltage(V)
2.5
0.1
1.5
1
0.5
0.01
0
40
80
120
160
200
0
-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.
FN1622-CD.0 — Data Sheet
36 V Input Voltage, 200 mA, Ultra-low IQ LDOs
LTP3558A
P-7
Package Dimension
SOT89-3
D
A
L
E
E1
D1
e
b
c
e1
Unit: mm
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.
FN1622-CD.0 — Data Sheet
36 V Input Voltage, 200 mA, Ultra-low IQ LDOs
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