STLQ50C-R STMicroelectronics, STLQ50C-R Datasheet - Page 11

• Manufacturer Part Number: STLQ50C-R
• Description: IC REG LDO 50MA ADJ SOT323-5
• Manufacturer: STMicroelectronics

Specifications of STLQ50C-R

• Regulator Topology: Positive Adjustable
• Voltage - Output: 1.22 ~ 11 V
• Voltage - Input: 2.3 ~ 12 V
• Voltage - Dropout (typical): 0.4V @ 50mA
• Number Of Regulators: 1
• Current - Output: 50mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SC-70-5, SC-88A, SOT-323-5, SOT-353, 5-TSSOP
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 12 V
• Output Voltage: 1.222 V to 11 V
• Output Type: Adjustable
• Dropout Voltage (max): 0.7 V at 50 mA
• Output Current: 500 mA
• Line Regulation: 0.3 %
• Load Regulation: 0.15 %
• 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
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-5819-2

STLQ50XX
Application information
7.3
Protection
The P-MOS pass element has an internal diode with anode connected to V
and cathode to
O
V
. In case V
> V
the current will flow from output to the input without any limitation. In this
I
O
I
case proper limiting network is recommended.
The current limitation is automatically provided by the characteristics of the PMOS pass
element (see typical characteristics), so the short circuit current is dependent on the input
voltage. When considering the short circuit current take care, in any case, to not exceed the
maximum power dissipation sustainable by the device.
The STLQ50 features an internal thermal protection that linearly reduces the output current
when the internal temperature increases, consequently, at a given load, also the output
voltage decreases. The action of the thermal protection starts at 125 °C when the output
voltage slightly decreases, while close to 163 °C the output voltage drops to 0 V. Since this
is a linear control, sudden over current conditions can quickly rise the chip temperature
without time for the thermal protection to act, so it cannot be used as a limitation for the
output current.
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