LDO40L
Datasheet
400 mA, 38 V low-dropout regulator, with 45 μA quiescent current
Features
DFN6
(wettable flanks)
•
•
•
•
•
•
•
•
•
AEC-Q100 qualified
Low quiescent current: typ. 45 µA at no load
Wide input voltage operating range up to 38 V
Low startup voltage: 3.5 V
Output current up to 400 mA
Output voltage options: Adj from 2.5 V and fixed, 3.0, 3.3, 5.0 and 8.5 V
Output voltage accuracy:
–
± 1% typ. @ 25 °C
–
± 3% (including line, load and temperature variation)
Ultra low-dropout:
–
36 mV @ 100 mA load current
–
140 mV @ 400 mA load current
High PSRR: 70 dB @ 1 kHz
Very low noise: 20 µVRMS/VOUT
•
•
•
Protection features: current limitation, thermal shutdown
-40 °C to +125 °C operating temperature range
Package: DFN6 (3x3) (wettable flanks)
•
Maturity status link
LDO40L
Applications
•
•
•
•
Automotive applications
Body control modules
Instruments and clusters
Automotive LED lighting
Description
The LDO40L is a 400 mA LDO regulator, designed for being used in severe
automotive environments.
Low quiescent current makes it suitable for applications permanently connected to
battery. This feature is especially critical when electronic modules remain in active
mode when ignition is off.
The LDO40L embeds protection functions, such as: current limit and thermal
shutdown.
The extended input voltage range, low drop voltage and low quiescent current
features make it suitable also for low power industrial and consumer applications.
DS12711 - Rev 3 - February 2020
For further information contact your local STMicroelectronics sales office.
www.st.com
LDO40L
Block diagram
1
Block diagram
Figure 1. Block diagram, fixed version
VOUT
VIN
Current
limit
Bandgap
reference
VSENSE
Thermal
protection
Driver
EN
Enable
GND
Figure 2. Block diagram, adjustable version
VOUT
VIN
Current
limit
Bandgap
reference
Thermal
protection
Driver
EN
VSENSE
ADJ
Enable
GND
DS12711 - Rev 3
page 2/25
LDO40L
Pin configuration
2
Pin configuration
Figure 3. Pin configuration (marking view)
GND
1
EN
2
VIN
3
TAB
6
ADJ / NC
5
VSENSE
4
VOUT
Table 1. Pin description
Symbol
Pin n°
Description
VIN
3
LDO supply voltage
GND
1
Ground
VOUT
4
LDO output voltage
Enable input: set VEN = high to turn on the device
EN
2
VEN = low to turn off the device
Don't leave this pin floating
DS12711 - Rev 3
VSENSE
5
ADJ / NC
6
TAB / Exposed pad
Exposed pad
Output sensing pin. It must be connected to VOUT
Adjust pin. Connect a resistor divider to set the output voltage
This pin is not internally connected in the fixed version
It must be connected to GND
page 3/25
LDO40L
Typical application diagram
3
Typical application diagram
Figure 4. Typical application diagram (fixed versions)
VCC
VSENSE
ON
EN
OFF
VOUT
VOUT
VIN
LDO40L
CIN
GND
COUT
Figure 5. Typical application diagram (adjustable versions)
VCC
VIN
ON
OFF
CIN
EN
VOUT
VOUT
VSENSE
LDO40L
GND
R1
COUT
ADJ
R2
DS12711 - Rev 3
page 4/25
LDO40L
Absolute maximum ratings
4
Absolute maximum ratings
Table 2. Absolute maximum ratings
Symbol
VIN
VOUT, VSENSE
Value
Unit
Input supply voltage
-0.3 to 40
V
Output voltage
-0.3 to 12
V
VADJ
Adjust pin voltage
-0.3 to VOUT
V
VEN
Enable pin voltage
-0.3 to VIN
V
IOUT
Output current
Internally limited
A
Power dissipation
Internally limited
W
PD
ESD
TJ
TSTG
Note:
Parameter
Charge device model
± 500
Human body model
± 2000
V
Operating junction temperature range
-40 to 150
°C
Storage temperature
-65 to 150
°C
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional
operation under these conditions is not implied. All values are referred to GND.
Table 3. Thermal data
Symbol
Note:
DS12711 - Rev 3
Parameter
DFN6
Unit
RthJA
Thermal resistance, junction-to-ambient
42
°C/W
RthJC
Thermal resistance, junction-to-case
5
°C/W
RthJA for DFN6 based on a 4-layer JEDEC PCB (2S2P) test board with 2 thermal vias.
page 5/25
LDO40L
Electrical characteristics
5
Electrical characteristics
Unless otherwise specified: TJ = -40 to 125 °C; VIN = 13.2 V, VOUT = 5 V, VEN = 5 V, IOUT = 1 mA;
CIN = COUT = 1 µF; Typical values referred to TA = 25 °C.
Table 4. Electrical characteristics
Symbol
VIN
VOUT
Parameter
Test conditions
Operating input voltage range
Device On
(see Section 6.1 Operating input
voltage)
Minimum input voltage for
regulation (1)
Operating output voltage range
Min.
Typ.
Max.
Unit
3.5
38
V
VOUT+
VDROP
38
V
2.5
11
V
-3
3
-1
1
VOUT + 1 V (2) < VIN < 18 V,
VOUT
Output voltage accuracy
0.1 mA < IOUT < 400 mA,
(fixed version)
-40 °C < TJ < 125 °C
TJ = 25 °C
%
VOUT + 1 V (2) < VIN < 18 V ,
VREF
Reference voltage
0.1 mA < IOUT < 400 mA,
(adjustable version) (VOUT - VADJ)
-40 °C < TJ < 125 °C
TJ = 25 °C
ΔVOUT/
ΔVIN
Static line regulation
ΔVOUT/
ΔIOUT
Static load regulation
VDROP
Dropout voltage (3)
eN
Output noise voltage
VOUT + 1 V
< VIN < 18 V;
0.1 mA < IOUT < 400 mA
0.0001
0.002
%/mA
IOUT = 0.1 A; VOUT = 5 V
36
70
IOUT = 0.4 A; VOUT = 5 V
140
270
f = 10 Hz to 100 kHz;
IOUT = 10 mA
20
VOUT = 5 V, f = 10 kHz;
IOUT = 10 mA
VOUT = 11 V, f = 100 Hz;
IOUT = 10 mA
VOUT = 11 V, f = 1 kHz;
IOUT = 10 mA
VOUT = 11 V, f = 10 kHz;
IOUT = 10 mA
DS12711 - Rev 3
1.212
%/V
IOUT = 10 mA
Quiescent current
V
0.02
VOUT = 5 V, f = 1 kHz;
IQ
1.236
0.002
IOUT = 1 mA
IOUT = 10 mA
Supply voltage rejection
1.2
1.188
(2)
VOUT = 5 V, f = 100 Hz;
SVR
1.164
IOUT = 0 to 1 mA
mV
µVRMS/
VOUT
77
70
45
77
dB
68
42
45
90
µA
page 6/25
LDO40L
Electrical characteristics
Symbol
IQ
Parameter
Max.
Unit
80
140
µA
Shutdown current
VEN = 0 V, VIN = 13.2 V
0.2
2.2
µA
1
µA
ISC
Short-circuit current
TSHDN
Typ.
IOUT = 400 mA
Adjustable input current
IEN
Min.
Quiescent current
IADJ
VEN
Test conditions
VIN = 6 V, VOUT = 0 V
1.2
1.6
Enable input logic low, VEN-L
0.65
Enable input logic high, VEN-H
Enable pin input current
A
2.7
VIN = 6 V, VEN = 5 V
0.5
Thermal shutdown
175
Hysteresis
25
1.5
V
µA
°C
1. VIN-MIN = VOUT + VDROP or 5 V, whichever is greater.
2. VIN = VOUT + 1 V or 5 V, whichever is greater.
3. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value.
DS12711 - Rev 3
page 7/25
LDO40L
Application information
6
Application information
6.1
Operating input voltage
The LDO40L is a low-dropout linear voltage regulator equipped with a low-RDS-(on) P-channel MOSFET used as a
pass-element. The device internal circuits are able to start with an input voltage as low as 3.5 V, whatever is the
nominal output voltage (see Figure 22. Output voltage vs. input voltage (no load). Defined the desired output
voltage VOUT-NOM, the minimum input voltage VIN-MIN needed to fully bias the pass-element, is
VIN-MIN = VOUT-NOM + VDROP. This allows to exit the dropout condition and achieve output voltage regulation.
The full regulation performance guaranteed by Section 5 Electrical characteristics in terms of output accuracy
and tolerance versus line and load changes is achieved for the highest input voltage among VIN-MIN = VOUT-NOM
+ 1 V and VIN-MIN = 5 V .
At input voltages lower than VIN-MIN = (VOUT-NOM + VDROP) the regulator enters dropout condition, regulation is
not guaranteed and the output voltage tracks the input except for a voltage depending on the load current (IOUT)
and the pass-element resistance (see Figure 22. Output voltage vs. input voltage (no load). This tracking behavior
can be useful during cold crank conditions.
6.2
Output voltage adjustment
The LDO40LY is available in fixed and adjustable output voltage versions. The latter option is usually chosen
when the output voltage has to be set to non-standard values. In the adjustable version, the output voltage can be
set from 2.5 V up to 11 V, by connecting a resistor divider between the ADJ pin and the output.
The architecture of the LDO40LY features a precise bandgap reference, which generates a fixed voltage VREF =
1.2 V between VOUT and ADJ terminals (refer to Figure 2. Block diagram, adjustable version and Figure 5. Typical
application diagram (adjustable versions) ). When the R1-R2 resistor divider is connected, a fixed current is
generated through the divider. Since the contribution of current sourced by the ADJ pin is negligible (few tens of
nA), the resulting output voltage is obtained by using the following equation:
VOUT = VREF 1 + R2/R1 , witℎ VREF = 1.2V typ.
(1)
In order to guarantee a correct regulation, the resistor divider must be calculated for an output voltage of min.
2.5 V.
6.3
Output voltage sense pin
In the DFN6 package on pin 5, an additional VSENSE connection is available. This pin must not be left floating,
since it is necessary for a correct sensing of the output voltage. It can be either connected to the load in a remotesensing configuration, or directly shorted to the VOUT pin (pin 4, refer to Figure 4. Typical application diagram
(fixed versions) and Figure 5. Typical application diagram (adjustable versions)).
6.4
Protection features
The device is self-protected from short-circuits and overtemperature events.
In case of strong overload or short-circuit on the output, the output current is limited to a value of typically 1.5 A
and kept constant even when the load impedance is zero. If the overload persists, the temperature on the internal
die rises, until the thermal protection is triggered, which happens when the junction temperature reaches 175 °C.
The device is subsequently shut down. As soon as the junction temperature falls again below 150 °C the device
re-starts.
Even if the above described protections are able to keep the device safe in the worst cases, a correct thermal
design of the application is recommended, according to the operating ambient temperature and the maximum
power dissipation allowed by the chosen package. In order to calculate the maximum power that the device can
dissipate, keeping the junction temperature below TJ-OP = 125 °C, the following formula is used:
PDMAX = 125 − TAMB / RTHJ − A
(2)
The power dissipation on the device is calculated as PD = (VIN - VOUT) x IOUT.
DS12711 - Rev 3
page 8/25
LDO40L
Enable pin
6.5
Enable pin
The enable function allows the LDO output to be enabled/disabled. The regulator is turned on in case the pin EN
is connected to a voltage higher than VEN-H, the LDO can be turned off if the voltage on EN pin is lower than
VEN-L.
No internal pull-up / pull-down is present on the EN pin, therefore it must not be left floating in the application.
6.6
Input and output capacitors
The LDO40LY requires external capacitors to ensure the regulator control loop stability.
A capacitor with a minimum value of 1 μF is required on at the input port of the LDO40LY.
This capacitor must be located as close as possible to the input pin of the device and returned to a clean analog
ground. Good quality ceramic capacitors are suggested.
The device control loop is designed to be stable with good quality ceramic capacitors (such as: X5R/X7R types)
with a minimum capacitance of 1 μF and equivalent series resistance in the [5 mΩ – 12 Ω] range. There is no
upper limit to the output capacitance. Figure 27. Stability plan shows the stability plan tested on real capacitors,
up to 10 µF. A value of 4.7 μF is suitable for the majority of applications, improving dynamic response and
minimizing the risk of ringing and oscillations. It is important to highlight that the output capacitor must maintain its
capacitance and ESR in the stable region over the full operating temperature, load and input voltage ranges, to
assure stability. Therefore, capacitance and ESR variations must be taken into account in the design phase to
ensure the device works in the expected stability region. There is no maximum limit to the output capacitance,
provided that the above conditions are respected.
DS12711 - Rev 3
page 9/25
LDO40L
Typical characteristics
7
Typical characteristics
The following plots are referred to the typical application circuit with CIN = COUT = 1 μF and TA = 25 °C unless
otherwise noted.
Figure 6. Output voltage vs. temperature (VIN = 6 V,
VOUT = adjusted to 5 V)
Figure 7. Output voltage vs. temperature (VIN = 13.2 V,
VOUT adjusted to 5 V)
5.10
5.10
5.08
5.08
Iout=100µA
Iout=400mA
Iout=1mA
5.06
VOUT [V]
VOUT [V]
5.04
Iout=100µA
Iout=400mA
Iout=1mA
5.06
5.04
5.02
5.00
4.98
5.02
5.00
4.98
4.96
4.96
4.94
4.94
4.92
4.92
4.90
4.90
-50
-25
0
25
50
75
100
125
-50
150
-25
0
50
75
100
125
150
Temperature [°C]
Temperature [°C]
Figure 8. Output voltage vs. temperature (VIN = 18 V,
VOUT = adjusted to 5 V)
Figure 9. Output voltage vs. temperature (VIN = 4.3 V,
VOUT = 3.3 V)
5.10
5.10
5.08
5.08
Iout=100µA
Iout=400mA
Iout=1mA
5.06
Iout=100µA
Iout=400mA
Iout=1mA
5.06
5.04
VOUT [V]
5.04
VOUT [V]
25
5.02
5.00
4.98
5.02
5.00
4.98
4.96
4.96
4.94
4.94
4.92
4.92
4.90
4.90
-50
-25
0
25
50
Temperature [°C]
DS12711 - Rev 3
75
100
125
150
-50
-25
0
25
50
75
100
125
150
Temperature [°C]
page 10/25
LDO40L
Typical characteristics
Figure 10. Output voltage vs. temperature (VIN = 13.2 V,
VOUT = 3.3 V)
Figure 11. Output voltage vs. temperature (VIN = 18 V,
VOUT = 3.3 V)
3.40
3.40
3.38
3.36
3.34
Iout=100µA
Iout=400mA
Iout=1mA
3.36
3.34
3.32
VOUT [V]
VOUT [V]
3.38
Iout=100µA
Iout=400mA
Iout=1mA
3.30
3.28
3.26
3.32
3.30
3.28
3.26
3.24
3.24
3.22
3.22
3.20
-50
-25
0
25
50
75
100
125
3.20
150
-50
-25
0
25
Temperature [°C]
125
150
1.28
1.26
1.26
Iout=100µA
Iout=400mA
1.24
1.22
1.20
1.18
1.22
1.20
1.18
1.16
1.16
1.14
1.14
1.12
-50
-25
0
25
50
75
100
125
Iout=100µA
Iout=400mA
1.24
VREF [V]
VREF [V]
100
Figure 13. Reference voltage vs. temperature (VIN = 18 V,
VOUT = adjusted to 5 V)
1.28
1.12
150
-50
-25
0
25
Temperature [°C]
VIN = 6 to18 V,
0.003
50
75
100
125
150
Temperature [°C]
Figure 14. Line regulation vs. temperature
Figure 15. Load regulation vs. temperature
VIN = 6 V, VOUT = 5 V, IOUT = 100 µA to 400 mA
VOUT = 5 V
0.0010
[%/mA]
0.002
0.001
Load regulation
[%/V]
75
Temperature [°C]
Figure 12. Reference voltage vs. temperature (VIN = 6 V,
VOUT = adjusted to 5 V)
Line regulation
50
0.000
-0.001
-0.002
0.0005
0.0000
-0.0005
-0.0010
-0.003
-50
-25
0
25
50
Temperature [°C]
DS12711 - Rev 3
75
100
125
150
-50
-25
0
25
50
75
100
125
150
Temperature [°C]
page 11/25
LDO40L
Typical characteristics
Figure 16. Dropout voltage vs. temperature
Figure 17. Short-circuit current vs. temperature
VOUT = 5 V
2.0
0.250
1.8
Iout=100mA
Iout=400mA
Short-circuit current [A]
[V]
0.200
Dropout Voltage
0.150
0.100
0.050
1.6
1.4
1.2
1.0
0.8
0.000
-50
-25
0
25
50
75
100
125
-50
150
-25
0
Figure 18. Quiescent current vs. temperature
100
125
150
VIN = 13.2 V, VEN = 0 V
2.00
Iout=0
Iout=1mA
Iout=400mA
1.80
1.60
1.40
Iq-Off [µA]
80.00
IQ [µA]
75
Figure 19. Off-state current vs. temperature
VIN = 13.2 V
100.00
50
Temperature [°C]
Temperature [°C]
120.00
25
60.00
40.00
1.20
1.00
0.80
0.60
0.40
20.00
0.20
0.00
0.00
-50
-25
0
25
50
75
100
125
-50
150
-25
0
25
50
75
100
125
150
Temperature [°C]
Temperature [°C]
Figure 20. Enable thresholds vs. temperature
Figure 21. Enable input current vs. temperature
VIN = 5 V, VEN = 5 V
IOUT = 1 mA
1.00
3.00
0.80
0.70
2.00
IEN [µA]
Enable thresholds [V]
0.90
2.50
1.50
1.00
0.60
0.50
0.40
0.30
0.20
0.50
0.10
0.00
0.00
-50
-25
0
25
50
75
Temperature [°C]
DS12711 - Rev 3
100
125
150
-50
-25
0
25
50
75
100
125
150
Temperature [°C]
page 12/25
LDO40L
Typical characteristics
Figure 22. Output voltage vs. input voltage (no load)
Figure 23. Output voltage vs. input voltage (IOUT = 1 mA)
VIN = VEN = from 0 V to 5 V, CIN = COUT = 1 µF, VOUT = 3.3 V, No Load
VIN = VEN = from 0 V to 5 V, CIN = COUT = 1 µF, VOUT = 3.3 V, IOUT = 1 mA
5.00
5.00
4.50
T=25°C
4.00
T=125°C
T=-40°C
T=25°C
4.00
T=125°C
3.00
2.50
2.00
3.00
2.50
2.00
1.50
1.50
1.00
1.00
0.50
0.50
0.00
0
0.5
1
T=-40°C
3.50
VOUT [V]
VOUT [V]
3.50
4.50
1.5
2
2.5
3
3.5
4
4.5
0.00
5
0
0.5
1
1.5
2
VIN [V]
Figure 24. Output voltage vs. input voltage
(IOUT = 100 mA)
3.5
4
4.5
5
VIN = VEN = from 0 V to 5 V, CIN = COUT = 1 µF, VOUT = 3.3 V, IOUT = 400 mA
VIN = VEN = from 0 V to 5 V, CIN = COUT = 1 µF, VOUT = 3.3 V, IOUT = 100 mA
5.00
4.50
T=25°C
4.50
T=25°C
4.00
T=125°C
4.00
T=125°C
T=-40°C
T=-40°C
3.50
VOUT [V]
3.50
VOUT [V]
3
Figure 25. Output voltage vs. input voltage
(IOUT = 400 mA)
5.00
3.00
2.50
2.00
3.00
2.50
2.00
1.50
1.50
1.00
1.00
0.50
0.50
0.00
0.00
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0
5
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
VIN [V]
VIN [V]
Figure 26. Quiescent current vs. input voltage
Figure 27. Stability plan
VIN = VIN_MIN to 38 V, IOUT = 1 mA to 400 mA , CIN = 1 µF
VIN = VEN = from 0 V to 38 V, VOUT = 5 V
200
10.000
180
No Load
160
ESR @100 kHz [Ω]
Iout=1mA
140
Iq [µA]
2.5
VIN [V]
120
100
80
60
40
1.000
Stability area
0.100
0.010
Untested area
20
0.001
0
0
DS12711 - Rev 3
5
10
15
20
VIN [V]
25
30
35
40
1
2.2
4.7
10
COUT [µF]
page 13/25
LDO40L
Typical characteristics
Figure 28. PSRR vs. frequency
Figure 29. Output noise spectrum
10.000
85
80
75
Output Noise Density: [µV/sqrt(Hz)]
70
65
60
55
PSRR (dB)
50
45
40
35
30
25
Vout=5V Iload=10mA
20
Vout=11V Iload=10mA
1.000
0.100
VIN = 13.2 V
VOUT = 5 V(ADJ)
CIN = 1 µF
COUT = 1 µF
IOUT = 10 mA
0.010
15
10
5
0
0.01
0.10
1.00
10.00
100.00
1,000.00
10,000.00
Frequency (kHz)
0.001
0.01
0.1
1
10
100
1000
Frequency: f [kHz]
Figure 30. Line transient (tr = tf = 1 µs)
Figure 31. Line transient (tr = tf = 10 µs)
Figure 32. Load transient (0.1 mA to 100 mA, tr = tf = 1 µs)
Figure 33. Load transient (0.1 mA to 100 mA,
tr = tf = 10 µs)
DS12711 - Rev 3
page 14/25
LDO40L
Typical characteristics
Figure 34. Load transient (1 mA to 400 mA, tr = tf = 1 µs)
Figure 35. Load transient (1 mA to 400 mA, tr = tf = 10 µs)
Figure 36. Enable transient (IOUT = 0.1 mA)
Figure 37. Enable transient (IOUT = 400 mA)
Figure 38. Start-up transient (IOUT = 0.1 mA)
Figure 39. Start-up transient (IOUT = 400 mA)
DS12711 - Rev 3
page 15/25
LDO40L
Package information
8
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.
8.1
DFN6 (3x3) package information
Figure 40. DFN6 (3x3) package outline
BOTTOM VIEW
DETAIL A
TOP VIEW
Table 5. DFN6 (3x3) mechanical data
Dim.
A
DS12711 - Rev 3
mm
Min.
Typ.
Max.
0.80
0.85
0.90
page 16/25
LDO40L
DFN6 (3x3) package information
Dim.
mm
Min.
Typ.
Max.
A1
0.00
b
0.20
0.25
0.30
D
2.95
3.00
3.05
D2
2.30
2.40
2.50
e
0.05
0.95 BSC
E
2.95
3.00
3.05
E2
1.50
1.60
1.70
L
0.30
0.40
0.50
K
0.30 Ref.
aaa
0.10
bbb
0.10
ccc
0.10
ddd
0.10
Figure 41. DFN6 (3x3) recommended footprint (dimensions are in mm)
DS12711 - Rev 3
page 17/25
LDO40L
DFN6 (3x3) packing information
8.2
DFN6 (3x3) packing information
Figure 42. DFN6 (3x3) tape outline
7875978_N
DS12711 - Rev 3
page 18/25
LDO40L
DFN6 (3x3) packing information
Figure 43. DFN6 (3x3) reel outline
7875978_N
Table 6. DFN6 (3x3) tape and reel mechanical data
Dim.
DS12711 - Rev 3
mm
Min.
Typ.
Max.
A0
3.20
3.30
3.40
B0
3.20
3.30
3.40
K0
1
1.10
1.20
page 19/25
LDO40L
Ordering information
9
Ordering information
Table 7. Order code
DS12711 - Rev 3
Order code
Package
Output voltage
Total accuracy
Marking
Packing
LDO40LPURY
DFN6
ADJ
3%
4LBA
Tape and reel
LDO40LPU33RY
DFN6
3.3 V
3%
4LBC
Tape and reel
LDO40LPU50RY
DFN6
5.0 V
3%
4LBD
Tape and reel
page 20/25
LDO40L
Revision history
Table 8. Document revision history
DS12711 - Rev 3
Date
Revision
12-Sep-2018
1
15-Jan-2019
2
10-Feb-2020
3
Changes
Initial release.
Updated: Figure 3. Pin configuration (marking view) and Table 1. Pin description.
Added: footnote in Table 7. Order code.
Updated Table 7. Order code.
page 21/25
LDO40L
Contents
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3
Typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5
Electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1
Operating input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.2
Output voltage adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.3
Output voltage sense pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.4
Protection features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.5
Enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.6
Input and output capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
8
Package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
9
8.1
DFN6 (3x3) package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.2
DFN6 (3x3) tape and reel mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
DS12711 - Rev 3
page 22/25
LDO40L
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Pin description. . . . . . . . . . . . . . . . . . . .
Absolute maximum ratings . . . . . . . . . . .
Thermal data. . . . . . . . . . . . . . . . . . . . .
Electrical characteristics . . . . . . . . . . . . .
DFN6 (3x3) mechanical data . . . . . . . . . .
DFN6 (3x3) tape and reel mechanical data
Order code . . . . . . . . . . . . . . . . . . . . . .
Document revision history . . . . . . . . . . . .
DS12711 - Rev 3
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. 3
. 5
. 5
. 6
16
19
20
21
page 23/25
LDO40L
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Figure 37.
Figure 38.
Figure 39.
Figure 40.
Figure 41.
Figure 42.
Figure 43.
DS12711 - Rev 3
Block diagram, fixed version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block diagram, adjustable version . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin configuration (marking view) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical application diagram (fixed versions) . . . . . . . . . . . . . . . . . . . .
Typical application diagram (adjustable versions) . . . . . . . . . . . . . . . .
Output voltage vs. temperature (VIN = 6 V, VOUT = adjusted to 5 V) . . . .
Output voltage vs. temperature (VIN = 13.2 V, VOUT adjusted to 5 V) . . .
Output voltage vs. temperature (VIN = 18 V, VOUT = adjusted to 5 V) . . .
Output voltage vs. temperature (VIN = 4.3 V, VOUT = 3.3 V) . . . . . . . . .
Output voltage vs. temperature (VIN = 13.2 V, VOUT = 3.3 V) . . . . . . . .
Output voltage vs. temperature (VIN = 18 V, VOUT = 3.3 V) . . . . . . . . . .
Reference voltage vs. temperature (VIN = 6 V, VOUT = adjusted to 5 V) .
Reference voltage vs. temperature (VIN = 18 V, VOUT = adjusted to 5 V)
Line regulation vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load regulation vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dropout voltage vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-circuit current vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . .
Quiescent current vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . .
Off-state current vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable thresholds vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable input current vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage vs. input voltage (no load). . . . . . . . . . . . . . . . . . . . . .
Output voltage vs. input voltage (IOUT = 1 mA) . . . . . . . . . . . . . . . . . .
Output voltage vs. input voltage (IOUT = 100 mA) . . . . . . . . . . . . . . . .
Output voltage vs. input voltage (IOUT = 400 mA) . . . . . . . . . . . . . . . .
Quiescent current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . .
Stability plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PSRR vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output noise spectrum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line transient (tr = tf = 1 µs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line transient (tr = tf = 10 µs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load transient (0.1 mA to 100 mA, tr = tf = 1 µs) . . . . . . . . . . . . . . . . .
Load transient (0.1 mA to 100 mA, tr = tf = 10 µs) . . . . . . . . . . . . . . . .
Load transient (1 mA to 400 mA, tr = tf = 1 µs) . . . . . . . . . . . . . . . . . .
Load transient (1 mA to 400 mA, tr = tf = 10 µs) . . . . . . . . . . . . . . . . .
Enable transient (IOUT = 0.1 mA). . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable transient (IOUT = 400 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start-up transient (IOUT = 0.1 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start-up transient (IOUT = 400 mA) . . . . . . . . . . . . . . . . . . . . . . . . . .
DFN6 (3x3) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DFN6 (3x3) recommended footprint (dimensions are in mm). . . . . . . . .
DFN6 (3x3) tape outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DFN6 (3x3) reel outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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page 24/25
LDO40L
IMPORTANT NOTICE – PLEASE READ CAREFULLY
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