ST LDCL015M33R, LDCL015MR User Manual
150 mA capless ultra low drop linear regulator ICs
Features
■ No input or output capacitor required
■ Input voltage from 1.8 V to 5.5 V
■ Very low drop: 50 mV at 100 mA load
■ ± 2% output voltage accuracy
■ Output voltage tolerance: ± 3%
■ Low noise
■ 150 mA guaranteed output current
■ Available in fixed and adjustable output
voltages, from 0.8 V in 100 mV steps
■ Internal current and thermal limit
■ Operating temperature range: - 40 °C to 125 °C
■ SOT23 5-lead package
Applications
■ Space-sensitive applications
■ Battery-powered equipment
■ Cordless and mobile phones
■ Industrial and medical equipment
■ Portable equipment
LDCL015XX
LDCL015XX33
SOT23-5L
10 kHz. The Enable logic control function puts the
LDCL015 in shutdown mode, reducing the total
current consumption to less than 1 µA. The
device also includes short-circuit constant current
limit and thermal protection. Typical applications
are mobile phones, personal digital assistants
and similar battery-powered systems.
Description
The LDCL015 provides 150 mA of maximum
current from an input voltage ranging from 1.8 V
to 5.5 V, with a typical dropout voltage of 50 mV. It
is stable with no input or output capacitor. Low
quiescent current, low noise and capless
operation make it suitable for low power batterypowered applications and allows the reduction of
board size. Typical power supply rejection ratio is
52 dB at low frequencies, and starts to roll off at
Table 1. Device summary
Part numbers Markings Order codes Output voltages
LDCL015XX33 CL33 LDCL015M33R 3.3 V
LDCL015XX CLAD LDCL015MR Adjustable from 0.8
September 2011 Doc ID 022166 Rev 2 1/16
www.st.com
16
Contents LDCL015XX, LDCL015XX33
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1 General operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.2 Thermal and short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.3 Output voltage setting for ADJ version . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.4 Enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16 Doc ID 022166 Rev 2
LDCL015XX, LDCL015XX33 Block diagram
1 Block diagram
Figure 1. LDCL015 block diagram
Doc ID 022166 Rev 2 3/16
Pin configuration LDCL015XX, LDCL015XX33
2 Pin configuration
Figure 2. Pin connections (top view)
Table 2. Pin description
Pin n° Symbol Name and function
1V
IN
Input voltage
2 GND Ground
3 EN Enable pin. The device is in OFF state when this pin is pulled low
4 ADJ/NC Feedback pin for adjustable version.Not connected on fixed version
5V
OUT
Output voltage
4/16 Doc ID 022166 Rev 2
LDCL015XX, LDCL015XX33 Typical application
3 Typical application
Figure 3. Typical application schematic - adjustable version (LDCL015XX)
IN
CIN
LDCL015
EN
ON
OFF
Figure 4. Typical application schematic - fixed V
GND
IN
CIN
LDCL015
EN
ON
OFF
GND
OUT
COUT
ADJ
AM09360v1
version (LDCL015XX33)
OUT
OUT
COUT
COUT
AM09361v1
R1
R2
Note: 1 R1 and R2 are calculated according to the following formula: R1 = R2 x (V
2C
and C
IN
are optional.
OUT
OUT/VADJ
-1).
Doc ID 022166 Rev 2 5/16
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