LDL212
Datasheet
High PSRR, low drop linear regulator IC
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)
Applications
•
•
•
•
•
Consumer
Industrial
SMPS
Point-of-load
DC-DC post-regulation
Maturity status link
LDL212
Description
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.
DS11245
-
Rev 3
-
September 2018
For further information contact your local STMicroelectronics sales office.
www.st.com
LDL212
Pin configuration
2
Pin configuration
Figure 3.
Pin configuration (top view)
1
2
3
6
5
4
SO-8
DFN6
GIPD261120151015MT
Table 1.
Pin description
Pin name
V
IN
V
OUT
GND
ADJ/sense
EN
NC
GND
Pin number
(SO-8)
4
1
2, 3, 6, 7
8
5
-
-
Pin number
(DFN6)
4
3
1
2
6
5
exposed pad
Input voltage
Output voltage
Output voltage
Feedback pin for adjustable version / V
OUT
sense on fixed
version
Enable pin. The device is in off-state when this pin is pulled low
Not connected
Exposed pad must be connected to GND
Description
1. The sense pin on the fixed version must be connected to V
OUT
for proper operation.
DS11245
-
Rev 3
page 3/28
LDL212
Typical application
3
Typical application
Figure 4.
Typical application circuit (adjustable version)
V
IN
V
I
V
O
V
OUT
LDL212
C
In
1µF
OFF
ON
R
1
ADJ
C
Out
4.7µF
EN
GND
R
2
Adjus ta ble ve rs ion
GIPD011220151346MT
Figure 5.
Typical application circuit (fixed version)
V
IN
V
I
V
O
V
OUT
LDL212
C
In
1µF
OFF
ON
EN
S ENS E
GND
C
Out
4.7µF
Fixe d ve rs ion
GIPD011220151347MT
Note:
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.
DS11245
-
Rev 3
page 4/28
LDL212
Maximum ratings
4
Maximum ratings
Table 2.
Absolute maximum ratings
Symbol
V
IN
V
OUT
V
EN
V
SENSE
V
ADJ
I
OUT
P
D
T
STG
T
OP
DC input voltage
DC output voltage
Enable input voltage
Output sense pin voltage
ADJ pin voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
Parameter
Value
- 0.3 to 20
- 0.3 to V
IN
+ 0.3
- 0.3 to V
IN
+ 0.3
- 0.3 to V
IN
+ 0.3
- 0.3 to 2
Internally limited
Internally limited
- 55 to 150
- 40 to 125
Unit
V
V
V
V
V
mA
mW
°C
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional
operation under these conditions is not implied.
Table 3.
Thermal data
Symbol
SO-8 batwing plastic micropackage
Parameter
Thermal resistance junction-to-case
Thermal resistance junction-to-ambient
Thermal resistance junction-to-case
Thermal resistance junction-to-ambient
Thermal resistance junction-to-case
Thermal resistance junction-to-ambient
Value
20
55
15
65
10
55
°C/W
Unit
DFN6 (2x2)
DFN6 (3x3)
DS11245
-
Rev 3
page 5/28
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