LDL212
High PSRR, low drop linear regulator IC
Datasheet - production data
Applications
Consumer
Industrial
SMPS
Point-of-load
DC-DC post-regulation
Description
Features
Input voltage from 2.5 V to 18 V
20 V AMR
Any fixed output voltages, from 1.2 V to 12 V
in 100 mV steps (from 1.2 V to 6.6 V in
50 mV steps) available on request
Adjustable version from 1.18 V to
V
IN
-V
DROP(MAX)
Guaranteed output current 1.2 A
Typical dropout 350 mV@1.2 A
Undervoltage lockout
Enable function
Internal thermal, current and power limitation
High PSRR: 87 dB @ 120 Hz, 75 dB @
1 kHz
Operating temperature range: -40 °C to
125 °C
Packages SO-8 batwing plastic
micropackage, DFN6 (3x3) and DFN6 (2x2)
The LDL212 provides 1.2 A of maximum current
from an input voltage range from 2.5 V to 18 V,
with a typical dropout voltage of 350 mV @ 1.2 A.
The high power supply rejection ratio of 87 dB at
120 Hz, and more than 40 dB at 100 kHz, makes
the LDL212 suitable for direct regulation in SMPS
and secondary linear regulation in DC-DC
converters. The LDL212 goes to shutdown mode
due to the enable logic control function, reducing
the total current consumption. The device also
includes the current limit, SOA and thermal
protections.
September 2016
DocID028297 Rev 2
1/28
www.st.com
This is information on a product in full production.
Contents
LDL212
Contents
1
2
3
4
5
6
7
Block diagram.................................................................................. 3
Pin configuration ............................................................................. 4
Typical application .......................................................................... 5
Maximum ratings ............................................................................. 6
Electrical characteristics ................................................................ 7
Typical performance characteristics ............................................. 9
Package information ..................................................................... 15
7.1
7.2
7.3
7.4
7.5
7.6
DFN6 (3x3) package information .................................................... 15
DFN6 (3x3) packing information...................................................... 17
DFN6 (2x2) package information .................................................... 19
DFN6 (2x2) packing information...................................................... 22
SO8-batwing package information .................................................. 23
SO8-batwing packing information ................................................... 25
8
9
Ordering information..................................................................... 26
Revision history ............................................................................ 27
2/28
DocID028297 Rev 2
LDL212
Block diagram
1
Block diagram
Figure 1: Block diagram (fixed)
Figure 2: Block diagram (adjustable)
DocID028297 Rev 2
3/28
Pin configuration
LDL212
2
Pin configuration
Figure 3: Pin configuration (top view)
Table 1: Pin description
Pin name
V
IN
V
OUT
GND
ADJ/sense
EN
NC
Notes:
(1)
Pin number
(SO-8)
4
1
2, 3, 6, 7
8
5
-
Pin number
(DFN6)
4
3
1
2
6
5
Input voltage
Output voltage
Ground
Description
Feedback pin for adjustable version / V
OUT
sense
(1)
on fixed version
Enable pin. The device is in off-state when this
pin is pulled low
Not connected
The sense pin on the fixed version must be connected to V
OUT
for proper operation.
4/28
DocID028297 Rev 2
LDL212
Typical application
3
Typical application
Figure 4: Typical application circuit (adjustable version)
Figure 5: Typical application circuit (fixed version)
R1 and R2 are calculated according to the following formula: R
1
= R
2
x (V
OUT
/V
ADJ
- 1). The output voltage of the adjustable version can be set from 1.18 V to V
IN
-
V
DROP(MAX)
, where V
DROP(MAX)
is the maximum dropout voltage, as defined in
Table
4: "Electrical characteristics".
DocID028297 Rev 2
5/28
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