L4993MD STMicroelectronics, L4993MD Datasheet - Page 15

• Manufacturer Part Number: L4993MD
• Description: IC REG LDO 5V 150MA 20SOIC
• Manufacturer: STMicroelectronics

Specifications of L4993MD

• Regulator Topology: Positive Fixed
• Voltage - Output: 5V
• Voltage - Input: 5.6 ~ 31 V
• Voltage - Dropout (typical): 0.2V @ 150mA
• Number Of Regulators: 1
• Current - Output: 150mA
• Current - Limit (min): 150mA
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC
• Number Of Outputs: 1
• Polarity: Negative, Positive
• Input Voltage Max: 40 V
• Output Voltage: - 0.3 V to + 6 V
• Output Type: Adjustable
• Dropout Voltage (max): 0.4 V at 150 mA
• Output Current: 150 mA
• Line Regulation: 25 mV
• Load Regulation: 25 mV
• Voltage Regulation Accuracy: 2 %
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L4993
3
Note:
3.1
Application information
Figure 24. L4993 application schematic
The input capacitor Cs > 200nF is necessary for the smoothing of line disturbances. The
output capacitor C01 > 100nF is necessary for the stability of the regulation loop. In order to
damp output voltage oscillations during high load current surges, it is recommended put an
additional electrolytic capacitor C02 > 10µF at the output pin.
Voltage regulator
Voltage regulator uses a p-channel transistor as a regulating element. With this structure,
very low dropout voltage at current up to 500mA is obtained. The output voltage is regulated
up to transient input supply voltage of 40V. No functional interruption due to over-voltage
pulses is generated. A short circuit protection to GND is provided. The voltage regulator
watchdog functionality can be disabled by putting WEn low.
Figure 25. Behavior of output current versus regulated voltage Vo
Ctw
Ctr
Vi
Cs
WEn
Vcw
Vcr
Vs
Wi
Watchdog
Watchdog
protection
protection
protection
Thermal
Thermal
Thermal
Vo_ref
Vo
Voltage reference
Voltage reference
Voltage reference
Voltage reference
Reset
Reset
Ishort Ilim
Gnd
+
+
-
-
Iout
Application information
Vo
Res
C
01
15/30
C
02