ST LDCL015M33R, LDCL015MR User Manual
LDCL015XX
LDCL015XX33
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
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 |
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Part numbers |
Markings |
Order codes |
Output voltages |
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LDCL015XX33 |
CL33 |
LDCL015M33R |
3.3 V |
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LDCL015XX |
CLAD |
LDCL015MR |
Adjustable from 0.8 |
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September 2011 |
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Doc ID 022166 Rev 2 |
1/16 |
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www.st.com
Contents |
LDCL015XX, LDCL015XX33 |
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Contents
1 |
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 3 |
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2 |
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4 |
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3 |
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5 |
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4 |
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
6 |
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5 |
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
7 |
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6 |
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
8 |
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7 |
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
11 |
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7.1 |
General operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
11 |
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7.2 |
Thermal and short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
11 |
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7.3 |
Output voltage setting for ADJ version . . . . . . . . . . . . . . . . . . . . . . . . . . . |
11 |
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7.4 |
Enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
11 |
8 |
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
12 |
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9 |
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
15 |
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LDCL015XX, LDCL015XX33 |
Block diagram |
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1 Block diagram
Figure 1. LDCL015 block diagram
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Pin configuration |
LDCL015XX, LDCL015XX33 |
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2 Pin configuration
Figure 2. Pin connections (top view)
Table 2. |
Pin description |
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Pin n° |
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Symbol |
Name and function |
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1 |
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VIN |
Input voltage |
2 |
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GND |
Ground |
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3 |
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EN |
Enable pin. The device is in OFF state when this pin is pulled low |
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4 |
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ADJ/NC |
Feedback pin for adjustable version.Not connected on fixed version |
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5 |
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VOUT |
Output voltage |
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LDCL015XX, LDCL015XX33 |
Typical application |
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3 Typical application
Figure 3. Typical application schematic - adjustable version (LDCL015XX)
IN OUT
CIN
ON
OFF
LDCL015
EN ADJ GND
R1
COUT
R2
AM09360v1
Figure 4. Typical application schematic - fixed VOUT version (LDCL015XX33)
IN |
OUT |
CIN
ON
OFF
COUT
LDCL015
EN
GND
AM09361v1
Note: 1 R1 and R2 are calculated according to the following formula: R1 = R2 x (VOUT/VADJ-1). 2 CIN and COUT are optional.
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