L4931CD50
The L4931CD50 is an electronic component from STMicroelectronics. View the full L4931CD50 datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
STMicroelectronics
Overview
Part: L4931 — STMicroelectronics
Type: Very Low Drop Voltage Regulator
Description: The L4931 is a very low drop voltage regulator with a 0.4 V typical dropout voltage, supporting output currents up to 250 mA, and available in fixed output voltages of 3.3 V, 3.5 V, and 5 V.
Operating Conditions:
- Supply voltage: Up to 20 V
- Operating temperature: -40 to 125 °C
- Output current: Up to 250 mA
Absolute Maximum Ratings:
- Max supply voltage: 20 V
- Max continuous current: Internally limited mA
- Max junction/storage temperature: 150 °C
Key Specs:
- Dropout voltage: 0.4 V (typ) at I_O = 250 mA
- Quiescent current (ON mode): 0.6 mA (typ) at I_O = 0 mA
- Quiescent current (OFF mode): 50 μA (typ) at V_I = 6 V
- Output current limit: 300 mA (typ)
- Output noise voltage: 50 μV (typ) at B = 10 Hz to 100 kHz
- Supply voltage rejection: 70 dB (typ) for 5 V version at f = 1 kHz
- Output voltage accuracy: ±1% (AB) or ±2% (C) at 25 °C
- Minimum output bypass capacitance for stability: 2.2 μF
Features:
- Very low dropout voltage (0.4 V)
- Very low quiescent current
- Logic controlled electronic shutdown
- Internal current and thermal limit
- Only 2.2 μF for stability
- Available in ±1% (AB) or 2% (C) selection at 25 °C
- Automotive-grade product available (3.3 V V_OUT in SO-8 package only)
Applications:
- Low noise, low power applications
- Battery-powered systems
Package:
- SO-8
- DPAK
- TO-92
Features
- Very low dropout voltage (0.4 V)
- Very low quiescent current
- Typ. 50 μA in OFF mode, 600 μA in ON mode
- Output current up to 250 mA
- Logic controlled electronic shutdown
- Output voltages: 3.3; 3.5; 5;
- Automotive-grade product: 3.3 V V OUT in SO-8 package only
- Internal current and thermal limit
- Only 2.2 μF for stability
- Available in ± 1 % (AB) or 2 % (C) selection at 25 °C
- Supply voltage rejection: 70 dB typ. for 5 V version
- Temperature range: from -40 to 125 °C
Pin Configuration
Figure 2. Pin connections (top view)
Electrical Characteristics
(Refer to the test circuits, T A = 25 °C, C I = 0.1 μF, C O = 2.2 μF unless otherwise specified).
Table 3. L4931ABxx33 electrical characteristics
| Symbol | Parameter | Test conditions | Min. | Typ. | Max. | Unit | |
|---|---|---|---|---|---|---|---|
| V O | Output voltage | I O = 5 mA, V I = 5.3 V | 3.267 | 3.3 | 3.333 | V | |
| V O | Output voltage | I O = 5 mA, V I = 5.3 V, T A = -25 to 85 °C | 3.234 | 3.366 | V | ||
| V I | Operating input voltage | I O = 250 mA | 20 | V | |||
| I out | Output current limit | 300 | mA | ||||
| ∆V O | Line regulation | V I = 4 to 20 V, I O = 0.5 mA | 3 | 15 | mV | ||
| ∆V O | Load regulation (1) | V I = 4.2 V, I O = 0.5 to 250 mA | 3 | 15 | mV | ||
| I d | Quiescent current | V I = 4.2 to 20 V, I O = 0 mA | 0.6 | 1 | mA | ||
| I d | ON mode | V I = 4.2 to 20 V, I O = 250 mA | 4 | 6 | mA | ||
| OFF mode | V I = 6 V | 50 | 100 | μA | |||
| SVR | Supply voltage rejection | I O = 5 mA | f = 120 Hz | 73 | dB | ||
| SVR | Supply voltage rejection | V I = 5.2 ± 1 V | f = 1 kHz | 70 | |||
| SVR | Supply voltage rejection | V I = 5.2 ± 1 V | f = 10 kHz | 55 | |||
| eN | Output noise voltage | B = 10 Hz to 100 kHz | 50 | μV | |||
| V d | Dropout voltage (1) | I O = 250 mA | 0.4 | 0.6 | V | ||
| V d | Dropout voltage (1) | I O = 250 mA, T A = -40 to 125 °C | 0.8 | V | |||
| V IL | Control input logic low | T A = -40 to 125 °C | 0.8 | V | |||
| V IH | Control input logic high | T A = -40 to 125 °C | 2 | V | |||
| I I | Control input current | V I = 6 V, V C = 6 V | 10 | μA | |||
| C O | Output bypass capacitance | ESR = 0.1 to 10 Ω, I O = 0 to 250 mA | 2 | 10 | μF |
- For SO-8 package the maximum limit of load regulation and dropout should be increased by 20 mV.
(Refer to the test circuits, T A = 25 °C, C I = 0.1 μF, C O = 2.2 μF unless otherwise specified).
Table 4. L4931Cxx33 electrical characteristics
| Symbol | Parameter | Test conditions | Min. Typ. | Max. | Unit | ||
|---|---|---|---|---|---|---|---|
| V O | Output voltage | I O = 5 mA, V I = 5.3 V | 3.234 | 3.3 | 3.366 | V | |
| V O | Output voltage | I O = 5 mA, V I = 5.3 V, T A =-25 to 85 °C | 3.168 | 3.432 | V | ||
| V I | Operating input voltage | I O = 250 mA | 20 | V | |||
| I out | Output current limit | 300 | mA | ||||
| ∆V O | Line regulation | V I = 4.1 to 20 V, I O = 0.5 mA | 3 | 18 | mV | ||
| ∆V O | Load regulation (1) | V I = 4.3 V, I O = 0.5 to 250 mA | 3 | 18 | mV | ||
| I d | Quiescent current ON mode | V I = 4.3 to 20 V, I O = 0 mA | 0.6 | 1 | mA | ||
| I d | Quiescent current ON mode | V I = 4.3 to 20 V, I O = 250 mA | 4 | 6 | mA | ||
| I d | OFF mode | V I = 6 V | 50 | 100 | μA | ||
| SVR | Supply voltage rejection | I O = 5 mA | f = 120 Hz | 73 | dB |
Table 4. L4931Cxx33 electrical characteristics
| Symbol | Parameter | Test conditions | Min. | Typ. | Max. | Unit | |
|---|---|---|---|---|---|---|---|
| SVR | Supply voltage rejection | V I = 5.3 ± 1 V | f = 1 kHz | 70 | dB | ||
| SVR | Supply voltage rejection | V I = 5.3 ± 1 V | f = 10 kHz | 55 | dB | ||
| eN | Output noise voltage | B = 10 Hz to 100 kHz | 50 | μV | |||
| V d | Dropout voltage (1) | I O = 250 mA | 0.4 | 0.6 | V | ||
| V d | Dropout voltage (1) | I O = 250 mA, T A = -40 to 125 °C | 0.8 | V | |||
| V IL | Control input logic low | T A = -40 to 125 °C | 0.8 | V | |||
| V IH | Control input logic high | T A = -40 to 125 °C | 2 | V | |||
| I I | Control input current | V I = 6 V, V C = 6 V | 10 | μA | |||
| C O | Output bypass capacitance | ESR = 0.1 to 10 Ω, I O = 0 to 250 mA | 2 | 10 | μF |
(Refer to the test circuits, T A = 25 °C, C I = 0.1 μF, C O = 2.2 μF unless otherwise specified).
Table 5. L4931CD33-TRY (automotive-grade) electrical characteristics
| Symbol | Parameter | Test conditions | Min. | Typ. | Max. | Unit | |
|---|---|---|---|---|---|---|---|
| V O | Output voltage | I O = 5 mA, V I = 5.3V, T A = 25°C | 3.234 | 3.3 | 3.366 | V | |
| V O | Output voltage | I O = 5 mA, V I = 5.3 V | 3.168 | 3.432 | |||
| V I | Operating input voltage | I O = 250 mA | 20 | V | |||
| Iout | Output current limit | T A = 25 °C | 300 | mA | |||
| ∆V O | Line regulation | V I = 4.1 to 20 V, I O = 0.5 mA | 20 | mV | |||
| ∆V O | Load regulation | V I = 4.3 V, I O = 0.5 to 250 mA | 38 | mV | |||
| Id | Quiescent current ON mode | V I = 4.3 to 20 V, I O = 0 mA | 1 | mA | |||
| Id | Quiescent current ON mode | VI =4.3 to 20 V, IO = 250 mA | 11 | mA | |||
| Id | OFF mode | VI= 6 V | 100 | μA | |||
| SVR | Supply voltage rejection | I O = 5 mA V I = 5.3 ± 1 V TA = 25 °C | f = 120 Hz | 73 | |||
| SVR | Supply voltage rejection | I O = 5 mA V I = 5.3 ± 1 V TA = 25 °C | f = 1 kHz | 70 | dB | ||
| SVR | Supply voltage rejection | I O = 5 mA V I = 5.3 ± 1 V TA = 25 °C | f = 10 kHz | 55 | dB | ||
| eN | Output noise voltage | B = 10 Hz to 100 kHz, TA = 25°C | 50 | μV | |||
| V d | Dropout voltage | I O = 250 mA, TA = 25 °C | 0.4 | 0.6 | V | ||
| V d | Dropout voltage | IO = 250 mA | 0.82 | V | |||
| V IL | Control input logic low | 0.82 | V | ||||
| V IH | Controlinput logic high | 2 | V | ||||
| I I | Control input current | V I = 6 V, V C= 6 V, TA = 25 °C | 10 | μA | |||
| C O | Output bypass capacitance | ESR = 0.1 to 10 Ω, I O = 0 to 250 mA,TA = 25 °C | 2 | 10 | μF |
Table 6. L4931ABxx35 electrical characteristics
| Symbol | Parameter | Test conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| V O | Output voltage | I O = 5 mA, V I = 5.5 V I = 5 mA, V = 5.5 V, T =-25 to 85 °C | 3.465 3.43 | 3.5 | 3.535 3.57 | V |
| V I | Operating input voltage | I O = 250 mA | 20 | V |
Table 6. L4931ABxx35 electrical characteristics
| Symbol | Parameter | Test conditions | Min. | Typ. | Max. | Unit | |
|---|---|---|---|---|---|---|---|
| I out | Output current limit | 300 | mA | ||||
| ∆V O | Line regulation | V I = 4.2 to 20 V, I O = 0.5 mA | 3 | 15 | mV | ||
| ∆V O | Load regulation (1) | V I = 4.4 V, I O = 0.5 to 250 mA | 3 | 15 | mV | ||
| I d | Quiescent current | V I = 4.4 to 20 V, I O = 0 mA | 0.6 | 1 | mA | ||
| I d | ON mode | V I = 4.4 to 20 V, I O = 250 mA | 4 | 6 | mA | ||
| I d | OFF mode | V I = 6 V | 50 | 100 | μA | ||
| SVR | Supply voltage rejection | I O = 5 mA | f = 120 Hz | 73 | dB | ||
| SVR | Supply voltage rejection | V = 5.4 ± 1 V | f = 1 kHz | 70 | dB | ||
| SVR | Supply voltage rejection | I | f = 10 kHz | 55 | dB | ||
| eN | Output noise voltage | B = 10 Hz to 100 kHz | 50 | μV | |||
| V d | Dropout voltage (1) | I O = 250 mA | 0.4 | 0.6 | V | ||
| V d | Dropout voltage (1) | I O = 250 mA, T A = -40 to 125 °C | 0.8 | V | |||
| V IL | Control input logic low | T A = -40 to 125 °C | 0.8 | V | |||
| V IH | Control input logic high | T A = -40 to 125 °C | 2 | V | |||
| I I | Control input current | V I = 6 V, V C = 6 V | 10 | μA | |||
| C O | Output bypass capacitance | ESR = 0.1 to 10 Ω, I O = 0 to 250 mA | 2 | 10 | μF |
(Refer to the test circuits, T A = 25 °C, C I = 0.1 μF, C O = 2.2 μF unless otherwise specified).
Table 7. L4931ABxx50 electrical characteristics
| Symbol | Parameter | Test conditions | Test conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|---|
| V O | Output voltage | I O = 5 mA, V I = 7 V | I O = 5 mA, V I = 7 V | 4.95 | 5 | 5.05 | V |
| V O | Output voltage | I O = 5 mA, V I = 7 V, T A =-25 to 85 °C | I O = 5 mA, V I = 7 V, T A =-25 to 85 °C | 4.9 | 5.1 | V | |
| V I | Operating input voltage | I O = 250 mA | I O = 250 mA | 20 | V | ||
| I out | Output current limit | 300 | mA | ||||
| ∆V O | Line regulation | V I = 5.8 to 20 V, I O = 0.5 mA | V I = 5.8 to 20 V, I O = 0.5 mA | 3.5 | 17.5 | mV | |
| ∆V O | Load regulation (1) | V I = 6 V, I O = 0.5 to 250 mA | V I = 6 V, I O = 0.5 to 250 mA | 3 | 15 | mV | |
| I d | Quiescent current | V I = 6 to 20 V, I O = 0 mA | V I = 6 to 20 V, I O = 0 mA | 0.6 | 1 | mA | |
| I d | ON mode | V I = 6 to 20 V, I O = 250 mA | V I = 6 to 20 V, I O = 250 mA | 4 | 6 | mA | |
| I d | OFF mode | V I = 6 V | V I = 6 V | 50 | 100 | μA | |
| SVR | Supply voltage rejection | I O = 5 mA V I = 7 ± 1 V | f = 120 Hz | 70 | dB | ||
| SVR | Supply voltage rejection | I O = 5 mA V I = 7 ± 1 V | f = 1 kHz | 67 | dB | ||
| SVR | Supply voltage rejection | I O = 5 mA V I = 7 ± 1 V | f = 10 kHz | 55 | dB | ||
| eN | Output noise voltage | B = 10 Hz to 100 kHz | B = 10 Hz to 100 kHz | 50 | μV | ||
| V d | Dropout voltage (1) | I O = 250 mA | I O = 250 mA | 0.4 | 0.6 | V | |
| V d | Dropout voltage (1) | I O = 250 mA, T A = -40 to 125 °C | I O = 250 mA, T A = -40 to 125 °C | 0.8 | V | ||
| V IL | Control input logic low | T A = -40 to 125 °C | T A = -40 to 125 °C | 0.8 | V | ||
| V IH | Control input logic high | T A = -40 to 125 °C | T A = -40 to 125 °C | 2 | V |
Table 7. L4931ABxx50 electrical characteristics
| Symbol | Parameter | Test conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| I I | Control input current | V I = 6 V, V C = 6 V | 10 | μA | ||
| C O | Output bypass capacitance | ESR = 0.1 to 10 Ω, I O = 0 to 250 mA | 2 | 10 | μF |
(Refer to the test circuits, T A = 25 °C, C I = 0.1 μF, C O = 2.2 μF unless otherwise specified).
Table 8. L4931Cxx50 electrical characteristics
| Symbol | Parameter | Test conditions | Min. | Typ. | Max. | Unit | |
|---|---|---|---|---|---|---|---|
| V O | Output voltage | I O = 5 mA, V I = 7 V | 4.9 | 5 | 5.1 | V | |
| V O | Output voltage | I O = 5 mA, V I = 7 V, T A =-25 to 85 °C | 4.8 | 5.2 | V | ||
| V I | Operating input voltage | I O = 250 mA | 20 | V | |||
| I out | Output current limit | 300 | mA | ||||
| ∆V O | Line regulation | V I = 5.8 to 20 V, I O = 0.5 mA | 3.5 | 17.5 | mV | ||
| ∆V O | Load regulation (1) | V I = 6 V, I O = 0.5 to 250 mA | 3 | 15 | mV | ||
| I d | Quiescent current | V I = 6 to 20 V, I O = 0 mA | 0.6 | 1 | mA | ||
| I d | ON mode | V I = 6 to 20 V, I O = 250 mA | 4 | 6 | mA | ||
| I d | OFF mode | V I = 6 V | 50 | 100 | μA | ||
| SVR | Supply voltage rejection | I O = 5 mA | f = 120 Hz | 70 | dB | ||
| SVR | Supply voltage rejection | V I = 7 ± 1 V | f = 1 kHz | 67 | dB | ||
| SVR | Supply voltage rejection | V I = 7 ± 1 V | f = 10 kHz | 55 | dB | ||
| eN | Output noise voltage | B = 10 Hz to 100 kHz | 50 | μV | |||
| V d | Dropout voltage (1) | I O = 250 mA | 0.4 | 0.6 | V | ||
| V d | Dropout voltage (1) | I O = 250 mA, T A = -40 to 125 °C | 0.8 | V | |||
| V IL | Control input logic low | T A = -40 to 125 °C | 0.8 | V | |||
| V IH | Control input logic high | T A = -40 to 125 °C | 2 | V | |||
| I I | Control input current | V I = 6 V, V C = 6 V | 10 | μA | |||
| C O | Output bypass capacitance | ESR = 0.1 to 10 Ω, I O = 0 to 250 mA | 2 | 10 | μF |
- For SO-8 package the maximum limit of load regulation and dropout should be increased by 20 mV.
(Refer to the test circuits, T A = 25 °C, C I = 0.1 μF, C O = 2.2 μF unless otherwise specified).
Table 9. L4931ABxx120 electrical characteristics
| Symbol | Parameter | Test conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| V O | Output voltage | I O = 5 mA, V I = 14 V | 11.88 | 12 | 12.12 | V |
| V O | Output voltage | I O = 5 mA, V I = 14 V, T A =-25 to 85 °C | 11.76 | 12.24 | V | |
| V I | Operating input voltage | I O = 250 mA | 20 | V | ||
| I out | Output current limit | 300 | mA | |||
| ∆V O | Line regulation | V I = 12.8 to 20 V, I O = 0.5 mA | 4 | 20 | mV | |
| ∆V O | Load regulation (1) | V I = 13 V, I O = 0.5 to 250 mA | 3 | 15 | mV | |
| I d | Quiescent current | V I = 13 to 20 V, I O = 0 mA | 0.8 | 1.6 | mA |
Table 9. L4931ABxx120 electrical characteristics
Absolute Maximum Ratings
Table 1. Absolute maximum ratings
| Symbol | Parameter | Value | Unit |
|---|---|---|---|
| V I | DC Input voltage | 20 | V |
| I O | Output current | Internally limited | mA |
| P D | Power dissipation | Internally limited | mW |
| T STG | Storage temperature range | -40 to 150 | °C |
| T OP | Operating junction temperature range | -40 to 125 | °C |
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
Table 2. Thermal data
| Symbol | Parameter | TO-92 | DPAK | SO-8 | Unit |
|---|---|---|---|---|---|
| R thJC | Thermal resistance junction-case | 8 | 20 | °C/W | |
| R thJA | Thermal resistance junction-ambient | 200 | 100 | 55 | °C/W |
Table 2. Thermal data
Typical Application
Figure 3. Test circuit
AMG050320171502MT
Package Information
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.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| C470029 | — | — |
| L4931ABDT33 | STMicroelectronics | — |
| L4931CD33 | STMicroelectronics | — |
| L4931CZ33 | STMicroelectronics | — |
| L4931CZ50 | STMicroelectronics | — |
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