LDK715
High input voltage 85 mA LDO linear regulator
Datasheet
-
production data
Applications
Mobile phones
Industrial
battery-powered systems
3x3
Description
The LDK715 is a high voltage, ultra low quiescent
current and low drop linear regulator capable of
providing an output current in excess of 85 mA.
The device operates over an input voltage range
from 4.3 V to 24 V, and it is stable with output
ceramic capacitors. Fault condition protection
includes short-circuit current limitation. The ultra
low quiescent current of 5 µA at full load makes it
highly suitable for low power applications and
battery-powered systems. The wide input voltage
range makes the LDK715 an ideal solution for low
power industrial applications. The LDK715 is
available in SOT23-5, or DFN8 3x3 - 8 leads.
Features
4.3 V to 24 V input voltage
Low-dropout voltage (500 mV typ. at 85 mA)
Very low quiescent current (5 µA typ. at full
load)
85 mA guaranteed output current
Output voltages 3.3 V, 4.2 V and 5.0 V (other
versions available on request)
Compatible with ceramic output capacitors
from 0.47 µF to 10 µF
Internal current limit
Packages: SOT23-5L and DFN8 3x3
Temperature range: from -40 °C to 125 °C
Table 1. Device summary
Order codes
Output voltage
SOT23-5L
LDK715M33R
LDK715M42R
LDK715M50R
1. Available on request.
DFN8 3x3
LDK715PU33R
LDK715PU42R
LDK715PU50R
(1)
3.3 V
4.2 V
5.0 V
November 2017
This is information on a product in full production.
DocID026678 Rev 2
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www.st.com
Contents
LDK715
Contents
1
2
3
4
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1
4.2
External capacitor requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power dissipation and junction temperature . . . . . . . . . . . . . . . . . . . . . . . 7
5
6
7
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1
7.2
SOT23-5L package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
DFN8 3x3 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8
Packaging information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.1
8.2
Tape and reel SOT23-5L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Tape and reel DFN8 3x3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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DocID026678 Rev 2
LDK715
Diagram
1
Diagram
Figure 1. Block diagram
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Pin configuration
LDK715
2
Pin configuration
Figure 2. Pin connection (top view)
Table 2. Pin description for DFN8 3x3
Symbol
IN
NC
GND
OUT
Pin number
1
2, 3, 5, 6, 7, and exp. pad
4
8
Name and function
Input voltage
Not internally connected
Common ground
Output voltage
Table 3. Pin description for SOT23-5L
Symbol
IN
NC
GND
OUT
Pin number
4
1.3
2
5
Name and function
Input voltage
Not internally connected
Common ground
Output voltage
4/19
DocID026678 Rev 2
LDK715
Maximum ratings
3
Maximum ratings
Table 4. Absolute maximum ratings
Symbol
V
IN
V
OUT
I
OUT
P
D(1), (2)
T
STG
T
OP
Parameter
DC input voltage
DC output voltage
Continuous output current
Maximum power dissipation, DFN package
Maximum power dissipation, SOT23-5L package
Storage temperature range
Operating junction temperature range
Value
From -0.3 to 26
From -0.3 to V
IN
+0.3
According to package
power dissipation
2
0.45
-65 to 150
-40 to 125
Unit
V
V
A
W
°C
°C
1. P
D
is based on an operating temperature of 25 °C or less. It must be derated according to the operating temperature.
2. The LDK715 has an internal constant current limit feature. Take care not to exceed the power dissipation ratings of the
package also during current limit and short-circuit events.
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 5. Thermal data
Symbol
R
thJA
Parameter
Thermal resistance junction ambient
SOT23-5L
195
DFN8
52
Unit
°C/W
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