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L5150CS
5V Low drop voltage regulator
September 2013 Doc ID 15542 Rev. 15 1/34
L5150CJ
L5150CS5 V low dropout voltage regulator
Datasheet − production data
Features Operating DC supply voltage range
5.6 V to 40V Low dropout voltage Low quiescent current consumption Precision output voltage 5 V +/- 2% Reset circuit sensing the output voltage Programmable reset pulse delay with external
capacitor Adjustable reset threshold Early warning Very wide stability range with low value output
capacitor Thermal shutdown and short-circuit protection Wide temperature range (Tj = -40°C to 150°C)
DescriptionL5150CJ and L5150CS are low dropout linear
regulators with microprocessor control functions
such as power on reset, low voltage reset, early
warning.
Typical quiescent current is 55 µA at very low
output current.
On chip trimming results in high output voltage
accuracy (2%). Accuracy is kept over wide
temperature range, line and load variation. Early
warning circuit monitors the input voltage and
compares it with an internal voltage reference.
Output voltage reset threshold can be adjusted
down to 3.5 V by means of an external voltage
divider.
The maximum input voltage is 40 V. The max
output current is internally limited. Internal
temperature protection disables the voltage
regulator output. In addition, only low-value
ceramic capacitor on output is required for
stability. Typical value
Table 1. Device summary
Contents L5150CJ / L5150CS2/34 Doc ID 15542 Rev. 15
Contents Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143.1 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3 Early warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Package and PCB thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194.1 PowerSSO-12 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2 SO-8 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255.1 ECOPACK® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2 PowerSSO-12 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.4 PowerSSO-12 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.5 SO-8 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
L5150CJ / L5150CS List of tables
Doc ID 15542 Rev. 15 3/34
List of tables
Table 1. Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 5. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 6. Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 7. Early warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 8. PowerSSO-12 thermal parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 9. SO-8 thermal parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 10. PowerSSO-12 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 11. SO-8 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 12. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
List of figures L5150CJ / L5150CS
4/34 Doc ID 15542 Rev. 15
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Configuration diagram (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Output voltage vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4. Output voltage vs. VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5. Drop voltage vs. output current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 6. Current consumption vs. output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7. Current consumption vs. output current (at light load condition). . . . . . . . . . . . . . . . . . . . . 11
Figure 8. Current consumption vs. input voltage (Io = 0.1 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 9. Current consumption vs. input voltage (Io = 75 mA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 10. Current limitation vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 11. Current limitation vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 12. Short-circuit current vs. Tj. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 13. Short-circuit current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 14. VRhth vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 15. VRlth vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 16. VEWi_thh vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 17. VEWi_thl vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 18. Icr vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 19. Idr vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 20. PSRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 21. Application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 22. Stability region . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 23. Maximum load variation response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 24. Reset time diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 25. Early warning time diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 26. PowerSSO-12 PC board(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 27. Rthj-amb vs PCB copper area in open box free air condition . . . . . . . . . . . . . . . . . . . . . . 19
Figure 28. PowerSSO-12 thermal impedance junction ambient single pulse . . . . . . . . . . . . . . . . . . . 20
Figure 29. Thermal fitting model of Vreg in PowerSSO-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 30. SO-8 PC board(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 31. Rthj-amb vs. PCB copper area in open box free air condition . . . . . . . . . . . . . . . . . . . . . . 22
Figure 32. SO-8 thermal impedance junction ambient single pulse . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 33. Thermal fitting model of Vreg in in SO-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 34. PowerSSO-12 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 35. SO-8 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 36. PowerSSO-12 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 37. PowerSSO-12 tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 38. SO-8 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 39. SO-8 tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
L5150CJ / L5150CS Block diagram and pins description
Doc ID 15542 Rev. 15 5/34
Block diagram and pins description
Block diagram and pins description L5150CJ / L5150CS
6/34 Doc ID 15542 Rev. 15
Table 2. Pins description
L5150CJ / L5150CS Electrical specifications
Doc ID 15542 Rev. 15 7/34
2 Electrical specifications
2.1 Absolute maximum ratings
Stressing the device above the rating listed in the Table 3: Absolute maximum ratings may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
Table 3. Absolute maximum ratings
Electrical specifications L5150CJ / L5150CS
8/34 Doc ID 15542 Rev. 15
2.2 Thermal data
2.3 Electrical characteristics
Values specified in this section are for VS = 5.6 V to 31 V, Tj = -40 °C to +150 °C unless
otherwise stated.
Table 4. Thermal data PowerSSO-12: The values quoted are for PCB 77 mm x 86 mm x 1.6 mm, FR4, double copper layer with
single heatsink layer, copper thickness 70 µm, thermal vias, copper area 2cm2.
SO-8: The values quoted are for PCB 48 mm x 48 mm x 2 mm, FR4, double copper layer with single
heatsink layer, copper thickness 35 µm, copper area 2cm2.
Table 5. General
L5150CJ / L5150CS Electrical specifications
Doc ID 15542 Rev. 15 9/34
Measured Output Current when the output voltage has dropped 100 mV from its nominal Value obtained at
13.5 V and Io =75 mA. Vs - Vo Measured Dropout when the output voltage has dropped 100 mV from its nominal Value obtained
at 13.5 V and Io =75 mA. Guaranteed by design.
Table 6. Reset
Table 5. General (continued)
Electrical specifications L5150CJ / L5150CS
10/34 Doc ID 15542 Rev. 15
Table 7. Early warning
Table 6. Reset (continued)
L5150CJ / L5150CS Electrical specifications
Doc ID 15542 Rev. 15 11/34
2.4 Electrical characteristics curves
Figure 3. Output voltage vs. Tj Figure 4. Output voltage vs. VS
Figure 5. Drop voltage vs. output current Figure 6. Current consumption vs. output
current
Figure 7. Current consumption vs. output
current (at light load condition)
Figure 8. Current consumption vs. input
voltage (Io = 0.1 mA)
Electrical specifications L5150CJ / L5150CS
12/34 Doc ID 15542 Rev. 15
Figure 9. Current consumption vs. input
voltage (Io = 75 mA)
Figure 10. Current limitation vs. Tj
Figure 11. Current limitation vs. input voltage Figure 12. Short-circuit current vs. Tj
Figure 13. Short-circuit current vs. input
voltage
Figure 14. VRhth vs. Tj
L5150CJ / L5150CS Electrical specifications
Doc ID 15542 Rev. 15 13/34
Figure 15.V Rlth vs. Tj Figure 16. V EWi_thh vs. Tj
Figure 17. VEWi_thl vs. Tj Figure 18. Icr vs. Tj
Figure 19. Idr vs. Tj Figure 20. PSRR
Application information L5150CJ / L5150CS
14/34 Doc ID 15542 Rev. 15
3 Application information
3.1 Voltage regulator
The voltage regulator uses a p-channel mos transistor as a regulating element. With this
structure a very low dropout voltage at current up to 150 mA is obtained. The output voltage
is regulated up to input supply voltage of 40 V. The high-precision of the output voltage (2%)
is obtained with a pre-trimmed reference voltage. The voltage regulator automatically
adapts its own quiescent current to the output current level. In light load conditions the
quiescent current goes to 55 µA only (low consumption mode). This procedure features a
certain hysteresis on the output current (see Figure 7). Short-circuit protection to GND and a
thermal shutdown are provided.
Figure 21. Application schematic
The input capacitor
may occur on the line. The second input capacitor
distant from the VS pin and it compensates smooth line disturbances. The C0 ceramic
capacitor, connected to the output pin, is for bypassing to GND the high-frequency noise
and it guarantees stability even during sudden line and load variations. Suggested value is
Stability region is reported in Figure 22. ESR
L5150CJ / L5150CS Application information
Doc ID 15542 Rev. 15 15/34
Figure 22. Stability region
Figure 23. Maximum load variation response
Application information L5150CJ / L5150CS
16/34 Doc ID 15542 Rev. 15
3.2 Reset
The reset circuit monitors the output voltage Vo. If the output voltage becomes lower than
Vo_th then Res goes low with a delay time (trr). When the output voltage becomes higher
than Vo_th then Res goes high with a delay time trd. This delay is obtained by 32 periods of
oscillator. The oscillator period is given by:
Equation 1
Tosc = [(VRhth - VRlth) x Ctr] / Icr + [(VRhth - VRlth) x Ctr] / Idr
where:
Icr = 20 µA is an internally generated charge current,
Idr = 20 µA is an internally generated discharge current,
VRhth = 2.5 V (typ) and VRlth = 0.9 V (typ) are two voltage thresholds,
Ctr is an external capacitor put between Vcr pin and GND.
L5150CJ / L5150CS Application information
Doc ID 15542 Rev. 15 17/34
Reset pulse delay Trd is given by:
Equation 2
trd = 32 x Tosc
The Output Voltage Reset threshold can be adjusted via an external voltage divider R1 + R2
(R1 connected between Res_Adj and V0, R2 connected between Res_Adj and GND) according
to the following formula:
Equation 3
Vthre = [(R1 + R2) / R2] * VRes_adj
The Output Voltage Reset threshold can be decreased down to 3.5 V. If it is needed to
maintain it to its default value (8% below V0_ref typical), it is enough to connect the Res_Adj
pin directly to GND.
Figure 24. Reset time diagram
