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LDL212
High PSRR, low drop linear regulator IC
Datasheet - production data
Applications
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Consumer
Industrial
SMPS
Point-of-load
DC-DC post-regulation
Description
Features
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

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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
VIN -VDROP(MAX)
Guaranteed output current 1.2 A
Typical dropout 350 [email protected] 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)
March 2016
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.
DocID028297 Rev 1
This is information on a product in full production.
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www.st.com
Contents
LDL212
Contents
1
Block diagram.................................................................................. 3
2
Pin configuration ............................................................................. 4
3
Typical application .......................................................................... 5
4
5
Maximum ratings ............................................................................. 6
Electrical characteristics ................................................................ 7
6
Typical performance characteristics ............................................. 9
7
Package information ..................................................................... 15
7.1
DFN6 (3x3) package information .................................................... 15
7.2
DFN6 (3x3) packing information...................................................... 17
7.3
DFN6 (2x2) package information .................................................... 19
7.4
DFN6 (2x2) packing information...................................................... 22
7.5
SO8-batwing package information .................................................. 23
7.6
SO8-batwing packing information ................................................... 25
8
Ordering information..................................................................... 26
9
Revision history ............................................................................ 27
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DocID028297 Rev 1
LDL212
1
Block diagram
Block diagram
Figure 1: Block diagram (fixed)
Figure 2: Block diagram (adjustable)
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Pin configuration
2
LDL212
Pin configuration
Figure 3: Pin configuration (top view)
Table 1: Pin description
Pin name
Pin number
(SO-8)
Pin number
(DFN6)
VIN
4
4
Input voltage
VOUT
1
3
Output voltage
GND
2, 3, 6, 7
1
Ground
ADJ/sense
8
2
Feedback pin for adjustable version / VOUT sense
(1) on fixed version
EN
5
6
Enable pin. The device is in off-state when this
pin is pulled low
NC
-
5
Not connected
Description
Notes:
(1)
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The sense pin on the fixed version must be connected to VOUT for proper operation.
DocID028297 Rev 1
LDL212
3
Typical application
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:
R1 = R2 x (VOUT/VADJ - 1).
The output voltage of the adjustable version can be set from 1.18 V to
VIN-VDROP(MAX), where VDROP(MAX) is the maximum dropout voltage, as defined in
Table 4: "Electrical characteristics".
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Maximum ratings
4
LDL212
Maximum ratings
Table 2: Absolute maximum ratings
Symbol
VIN
Parameter
Unit
- 0.3 to 20
V
VOUT
DC output voltage
- 0.3 to VIN + 0.3
V
VEN
Enable input voltage
- 0.3 to VIN + 0.3
V
Output sense pin voltage
- 0.3 to VIN + 0.3
V
- 0.3 to 2
V
VSENSE
DC input voltage
Value
VADJ
ADJ pin voltage
IOUT
Output current
Internally limited
mA
PD
Power dissipation
Internally limited
mW
TSTG
Storage temperature range
- 55 to 150
°C
TOP
Operating junction temperature range
- 40 to 125
°C
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
DFN6 (2x2)
DFN6 (3x3)
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Parameter
Value
Thermal resistance junction-to-case
20
Thermal resistance junction-to-ambient
55
Thermal resistance junction-to-case
20
Thermal resistance junction-to-ambient
107
Thermal resistance junction-to-case
10
Thermal resistance junction-to-ambient
55
DocID028297 Rev 1
Unit
°C/W
LDL212
5
Electrical characteristics
Electrical characteristics
TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = 1 μF, COUT = 4.7 μF, IOUT = 10 mA, VEN = VIN, unless
otherwise specified. a
Table 4: Electrical characteristics
Symbol
VIN
VUVLO
Parameter
Test conditions
Operating
input voltage
Min.
Typ.
2.5
Turn-on
threshold
2.3
Hysteresis
200
Max.
Unit
18
V
2.4
V
mV
IOUT = 10 mA
TJ = 25 °C
VOUT
2
%
-3
3
%
VOUT accuracy
IOUT = 10 mA
-40 °C < TJ < 125 °C
VADJ
-2
Adjustable
pin voltage
VIN = 2.5 V IOUT = 10 mA
TJ = 25 °C
VIN = 2.5 V IOUT = 10 mA
-40 °C < TJ < 125 °C
1.18
V
-2
+2
%
-3
+3
%
IADJ
Adjustable
pin current
VIN = 2.5 V IOUT = 10 mA
20
ΔVOUT
Line
regulation
VOUT + 1 V ≤ VIN ≤ 18 V
IOUT = 10 mA
0.002
0.01
%/V
ΔVOUT
Load
regulation
IOUT = 10 mA to 1.2 A
0.0001
0.0005
%/mA
VDROP
Dropout
voltage (1)
IOUT = 1.2 A VOUT > 3 V
-40 °C < TJ < 125 °C
350
600
mV
Output noise
voltage
10 Hz to 100 kHz,
IOUT = 100 mA
60
eN
nA
µVRMS/VOUT
VIN = VOUT(NOM) + 1 V ± VRIPPLE
VRIPPLE = 0.5 V, f = 120 Hz
SVR
Supply voltage
rejection
87
VIN = VOUT(NOM) + 1 V ± VRIPPLE
VRIPPLE = 0.5 V, f = 1 kHz
75
dB
VIN = VOUT(NOM) + 1 V ± VRIPPLE
VRIPPLE = 0.5 V, f = 100 kHz
IQ
Quiescent
current
IOUT = 0 mA to 1.2 A
-40 °C < TJ < 125 °C
250
380
µA
VIN input current in OFF mode
VEN = GND VIN = 18 V
a
44
0.3
1.5
For VOUT(NOM) < 1.5 V, VIN = 2.5 V.
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Electrical characteristics
Symbol
ISC
LDL212
Parameter
Test conditions
Short-circuit
current
RL = 0
Enable input
logic low
VIN = 2.5 V to 18 V
-40 °C < TJ < 85 °C
Enable input
logic high
VIN = 2.5 V to 18 V
-40 °C < TJ < 85 °C
VEN
Min.
Typ.
1.5
2
Unit
A
0.4
V
1.2
1.5
IEN
Enable input
current
TON
Turn-on
time (2)
120
Thermal
shutdown
175
Hysteresis
25
TSHDN
Max.
VEN = VIN , VIN = 18 V
16
20
µA
µs
°C
Notes:
(1)
Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its
nominal value. This specification is not valid for output voltages below 2.2 V.
(2)
Turn-on time is the time measured between the enable input just exceeding VEN high value and the output
voltage just reaching 95% of its nominal value.
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DocID028297 Rev 1
LDL212
6
Typical performance characteristics
Typical performance characteristics
Figure 6: Output voltage vs temperature
(VIN = 2.5 V, VOUT = VADJ, IOUT = 0 mA)
Figure 7: Output voltage vs temperature
(VIN = 2.5 V, VOUT = VADJ, IOUT = 1200 mA)
Figure 8: Output voltage vs temperature
(VIN = 6 V, VOUT = 5 V, IOUT = 10 mA)
Figure 9: Output voltage vs temperature
(VIN = 6 V, VOUT = 5 V, IOUT = 1200 mA)
Figure 10: Line regulation vs temperature (VIN
= 6 to 18 V, VOUT = 5 V, IOUT = 10 mA )
Figure 11: Line regulation vs temperature
(VIN = 2.5 to 18 V, VOUT = VADJ, IOUT = 10 mA)
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Typical performance characteristics
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LDL212
Figure 12: Load regulation vs temperature
(VIN = 6 V, VOUT = 5 V, IOUT = 10 to 1200 mA )
Figure 13: Load regulation vs temperature
(VIN = 2.5 V, VOUT = VADJ, IOUT = 0 to 1200 mA)
Figure 14: Enable thresholds vs temperature
(VOUT = VADJ)
Figure 15: Enable thresholds vs
temperature(VOUT = 5 V)
Figure 16: Dropout voltage vs temperature
Figure 17: Quiescent current vs temperature
(VOUT = 5 V, IOUT = 0 mA)
DocID028297 Rev 1
LDL212
Typical performance characteristics
Figure 18: Quiescent current vs temperature
(VOUT = 5 V, IOUT = 600 mA, 1.2 A)
Figure 19: Quiescent current vs temperature
(VOUT = VADJ, IOUT = 0 mA)
Figure 20: Quiescent current vs temperature
(VOUT = VADJ, IOUT = 600 mA)
Figure 21: Quiescent current vs temperature
(VOUT = VADJ, IOUT = 1.2 A)
Figure 22: Off-state current vs temperature
(VOUT = 5 V)
Figure 23: Off-state current vs temperature
(VOUT = VADJ)
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Typical performance characteristics
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LDL212
Figure 24: Short-circuit current vs dropout
voltage (VOUT = 5 V)
Figure 25: Short-circuit current vs dropout
voltage (VOUT = VADJ)
Figure 26: SVR versus frequency
Figure 27: Output noise spectral density
(VO = VADJ)
Figure 28: Output noise spectral density
(VO = 5 V)
Figure 29: Output noise spectral density
(VO = 12 V)
DocID028297 Rev 1
LDL212
Typical performance characteristics
Figure 30: Stability plan (VOUT = 5 V)
Figure 31: Stability plan (VOUT = VADJ)
Figure 32: Startup with enable (VOUT = 5 V)
Figure 33: Startup with enable (VOUT = VADJ)
Figure 34: Turn-on time (VOUT = 5 V)
Figure 35: Turn-on time (VOUT = VADJ)
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Typical performance characteristics
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LDL212
Figure 36: Line transient (VOUT = 5 V)
Figure 37: Line transient (VOUT = VADJ)
Figure 38: Load transient (VOUT = 5 V)
Figure 39: Load transient (VOUT = VADJ)
DocID028297 Rev 1
LDL212
7
Package information
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK ®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
7.1
DFN6 (3x3) package information
Figure 40: DFN6 (3x3) package outline
DocID028297 Rev 1
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Package information
LDL212
Table 5: DFN6 (3x3) mechanical data
mm
Dim.
Min.
A
0.80
A1
0
A3
0.23
D
2.90
D2
2.23
E
2.90
E2
1.50
e
1
0.02
0.05
0.45
3
3.10
2.50
3
3.10
1.75
0.95
0.30
0.40
Figure 41: DFN6 (3x3) recommended footprint
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Max.
0.20
b
L
Typ.
DocID028297 Rev 1
0.50
LDL212
7.2
Package information
DFN6 (3x3) packing information
Figure 42: DFN6 (3x3) tape outline
7875978_N
DocID028297 Rev 1
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Package information
LDL212
Figure 43: DFN6 (3x3) reel outline
7875978_N
Table 6: DFN6 (3x3) tape and reel mechanical data
mm
Dim.
18/28
Min.
Typ.
Max.
A0
3.20
3.30
3.40
B0
3.20
3.30
3.40
K0
1
1.10
1.20
DocID028297 Rev 1
LDL212
7.3
Package information
DFN6 (2x2) package information
Figure 44: DFN6 (2x2) package outline
7733060 revE
DocID028297 Rev 1
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Package information
LDL212
Table 7: DFN6 (2x2) mechanical data
mm
Dim.
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Min.
Typ.
Max.
A
0.70
0.75
0.80
A1
0.00
0.02
0.05
A3
-
0.203 ref
-
b
0.25
0.30
0.35
D
-
2.00
-
E
-
2.00
-
e
-
0.50
-
D2
0.77
0.92
1.02
E2
1.30
1.45
1.55
K
0.15
-
-
L
0.20
0.30
0.40
aaa
-
0.05
-
bbb
-
0.10
-
ccc
-
0.10
-
ddd
-
0.05
-
eee
-
0.08
-
DocID028297 Rev 1
LDL212
Package information
Figure 45: DFN6 (2x2) recommended footprint
7733060 revE
DocID028297 Rev 1
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Package information
7.4
LDL212
DFN6 (2x2) packing information
Figure 46: DFN6 (2x2) reel outline
Table 8: DFN6(2x2) tape and reel mechanical data
Dim.
mm
Min.
Typ.
A
180
C
12.8
D
20.2
N
60
13.2
T
22/28
Max.
14.4
A0
2.4
B0
2.4
K0
1.3
P0
4
P
4
DocID028297 Rev 1
LDL212
7.5
Package information
SO8-batwing package information
Figure 47: SO-8 batwing package outline
Table 9: SO-8 batwing mechanical data
mm
Dim.
Min.
Typ.
A
Max.
1.75
A1
0.10
A2
1.25
b
0.31
0.51
b1
0.28
0.48
c
0.10
0.25
c1
0.10
0.23
D
4.80
4.90
5.00
E
5.80
6.00
6.20
E1
3.80
3.90
4.00
e
0.25
1.27
h
0.25
0.50
L
0.40
1.27
L1
1.04
L2
0.25
k
0°
ccc
8°
0.10
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Package information
LDL212
Figure 48: SO-8 batwing recommended footprint
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DocID028297 Rev 1
LDL212
7.6
Package information
SO8-batwing packing information
Figure 49: SO8-batwing tape and reel outline
Table 10: SO8-batwing mechanical data
mm
Dim.
Min.
A
Typ.
Max.
330
C
12.8
D
20.2
N
60
T
13.2
22.4
A0
8.1
8.5
B0
5.5
5.9
K0
2.1
2.3
P0
3.9
4.1
P
7.9
8.1
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Ordering information
8
LDL212
Ordering information
Table 11: Order code
DFN6 (3x3)
DFN6 (2x2)
SO-8 batwing plastic micropackage
LDL212PU12R
1.2
LDL212PU15R
1.5
LDL212PU18R
1.8
LDL212PU25R
2.5
LDL212PU30R
3
LDL212D33R
3.3
LDL212PU50R
LDL212PUR
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Output voltage (V)
5
LDL212PVR
LDL212DR
DocID028297 Rev 1
Adjustable
LDL212
9
Revision history
Revision history
Table 12: Document revision history
Date
Revision
02-Mar-2016
1
DocID028297 Rev 1
Changes
Initial release.
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LDL212
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