LDK120
200 mA low quiescent current very low noise LDO
Datasheet
-
production data
Applications
Mobile phones
Personal digital assistants (PDAs)
Cordless phones and similar battery-powered
systems
Digital still cameras
Description
The LDK120 low drop voltage regulator provides
200 mA of maximum current from an input supply
voltage in the range of 1.9 V to 5.5 V, with a
typical dropout voltage of 100 mV.
Features
Input voltage from 1.9 to 5.5 V
Very low dropout voltage (100 mV typ. at 100
mA load)
Low quiescent current (max. 100 µA, 1 µA in
OFF mode)
Very low noise
Output voltage tolerance: ± 2.0% @ 25 °C
200 mA guaranteed output current
Wide range of fixed output voltages available
on request: from 0.8 V to 3.5 V with 100 mV
step
Adjustable version: from 0.8 V to V
IN
-V
drop
Logic-controlled electronic shutdown
Compatible with ceramic capacitor C
OUT
= 1 µF
Internal current and thermal limit
Available in SOT23-5L, SOT323-5L and DFN6
(1.2 x 1.3 mm) packages
Temperature range: -40 °C to 125 °C
It is stabilized with a ceramic capacitor on the
output.
The very low drop voltage, low quiescent current
and low noise features make it suitable for low
power battery-powered applications.
An enable logic control function puts the LDK120
in shutdown mode allowing a total current
consumption lower than 1 µA.
The device also includes a short-circuit constant
current limiting and thermal protection.
January 2018
This is information on a product in full production.
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Contents
LDK120
Contents
1
2
3
4
5
6
7
8
9
10
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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Pin configuration
LDK120
2
Pin configuration
Figure 2. Pin connection (top view)
SOT23-5L, SOT323-5L
DFN6 (1.2 x 1.3)
Table 1. Pin description (SOT23-5L, SOT323-5L)
Pin
SOT23/
SOT323
1
2
3
4
5
-
Symbol
DFN6
6
2
4
3
1
5
IN
GND
EN
BYP
(1)
/ADJ
/NC
OUT
N/C
Fixed
Adjustable
Input voltage of the LDO
Common ground
Enable pin logic input: Low = shutdown, High = active
Bypass capacitor
Adjustable pin
Internally not connected
D version
Function
Output voltage of the LDO
Not connected. This pin should be connected to GND
1. Bypass capacitor for noise reduction on fixed version is optional, if not used the relevant pin must be left
floating with no routing on the board.
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