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AN761

Title	Title LDO Thermal Considerations
Name	Name AN761
Date	Date 06/24/2015
Product Categories	Product Categories Power Management ICs / Switching Regulator
Description	Description Battery-operated equipment (most notably cell phones and notebook computers) have created a strong demand for linear regulators in small packages. While such packages save space, they also have poor heat transfer characteristics. To minimize power dissipation, these regulators are designed to work with very low input/output voltage differentials, hence the name “low dropout regulators” or LDOs. LDOs specify maximum output current and input voltage limits, but blindly operating the LDO within these limits will surely result in exceeding the maximum power dissipation capability.

Silicon Products

Description	Product	Description
MCP1700 Low Quiescent Current LDO	MCP1700	Low Quiescent Current LDO
MCP1701 3.0V LDO POSITIVE VOTLAGE Regulator 2% TOL.	MCP1701	3.0V LDO POSITIVE VOTLAGE Regulator 2% TOL.
MCP1701A 3.3V LDO Positive Voltage Regulator 2% Tol	MCP1701A	3.3V LDO Positive Voltage Regulator 2% Tol
MCP1702 250mA low IQ LDO	MCP1702	250mA low IQ LDO
MCP1703 Low Iq 250mA LDO, Vin 16V max, Vout =3.0V	MCP1703	Low Iq 250mA LDO, Vin 16V max, Vout =3.0V
MCP1711 150 mA Ultra-Low Iq, Capless LDO Regulator	MCP1711	150 mA Ultra-Low Iq, Capless LDO Regulator
MCP1725 500mA CMOS LDO w/ Power Good & Shutdown	MCP1725	500mA CMOS LDO w/ Power Good & Shutdown
MCP1726 1A Low Voltage Low lq LDO	MCP1726	1A Low Voltage Low lq LDO
MCP1727 1.5A Low Voltage LDO	MCP1727	1.5A Low Voltage LDO
MCP1790 High-Voltage, LDO, 70 mA	MCP1790	High-Voltage, LDO, 70 mA
MCP1791 High Voltage Regulator w/5.0V Regulated Power Supply Output	MCP1791	High Voltage Regulator w/5.0V Regulated Power Supply Output
MCP1801 High PSRR 150 mA LDO, Vin 10V max, Vout =0.9V	MCP1801	High PSRR 150 mA LDO, Vin 10V max, Vout =0.9V
MCP1802 High PSRR 300 mA LDO, Vin 10V max, Vout =0.9V	MCP1802	High PSRR 300 mA LDO, Vin 10V max, Vout =0.9V
MCP1812 300 mA Ultra-Low Iq LDO	MCP1812	300 mA Ultra-Low Iq LDO
MCP1824 300mA CMOS LDO, Vout=2.5V, Extended Temp Range	MCP1824	300mA CMOS LDO, Vout=2.5V, Extended Temp Range
MCP1824S 300mA CMOS LDO, Vout=2.5V, Extended Temp Range	MCP1824S	300mA CMOS LDO, Vout=2.5V, Extended Temp Range
MCP1825 500mA Low Voltage, Low IQ LDO	MCP1825	500mA Low Voltage, Low IQ LDO
MCP1825S 500mA Low Voltage, Low IQ LDO	MCP1825S	500mA Low Voltage, Low IQ LDO
MCP1826 1.0A LDO	MCP1826	1.0A LDO
MCP1826S 1.0A LDO	MCP1826S	1.0A LDO
MCP1827 1.5A LDO Regulator	MCP1827	1.5A LDO Regulator
MCP1827S 1.5A LDO. 133K Analog 0.6um Poly gate, Triple metal w/ESD Fuse process.	MCP1827S	1.5A LDO. 133K Analog 0.6um Poly gate, Triple metal w/ESD Fuse process.
TC1014 High Accuracy Low Noise 50mA CMOS LDO	TC1014	High Accuracy Low Noise 50mA CMOS LDO
TC1015 High Accuracy Low Noise 100mA CMOS LDO	TC1015	High Accuracy Low Noise 100mA CMOS LDO
TC1016 High Accuracy Low Noise 80mA CMOS LDO	TC1016	High Accuracy Low Noise 80mA CMOS LDO
TC1017 150mA Tiny CMOS LDO with Shutdown	TC1017	150mA Tiny CMOS LDO with Shutdown
TC1054 50mA High Accuracy CMOS LDO w/ Shutdown and Error Output	TC1054	50mA High Accuracy CMOS LDO w/ Shutdown and Error Output
TC1055 100mA High Accuracy CMOS LDO w/ Shutdown and Error Output	TC1055	100mA High Accuracy CMOS LDO w/ Shutdown and Error Output
TC1070 50mA Adjustable CMOS LDO w/ Shutdown	TC1070	50mA Adjustable CMOS LDO w/ Shutdown
TC1071 100mA Adjustable CMOS LDO w/ Shutdown	TC1071	100mA Adjustable CMOS LDO w/ Shutdown
TC1072 50mA CMOS LDO w/ Shutdown, Error Output, and Vref Bypass	TC1072	50mA CMOS LDO w/ Shutdown, Error Output, and Vref Bypass
TC1073 100mA CMOS LDO w/ Shutdown, Error Output, and Vref Bypass	TC1073	100mA CMOS LDO w/ Shutdown, Error Output, and Vref Bypass
TC1107 300mA CMOS LDO with Shutdown and Vref Bypass	TC1107	300mA CMOS LDO with Shutdown and Vref Bypass
TC1108 300mA CMOS LDO	TC1108	300mA CMOS LDO
TC1173 300mA CMOS LDO w/ Shutdown Error Output and Bypass Input	TC1173	300mA CMOS LDO w/ Shutdown Error Output and Bypass Input
TC1174 300mA CMOS LDO with Shutdown and Vref Bypass	TC1174	300mA CMOS LDO with Shutdown and Vref Bypass
TC1185 150mA CMOS LDO w/ Shutdown and Vref Bypass	TC1185	150mA CMOS LDO w/ Shutdown and Vref Bypass
TC1186 150mA CMOS LDO with Shutdown and Error Output	TC1186	150mA CMOS LDO with Shutdown and Error Output
TC1187 150mA Adjustable CMOS LDO with Shutdown	TC1187	150mA Adjustable CMOS LDO with Shutdown
TC1188 MAX8863/64 120mA Linear Regulator	TC1188	MAX8863/64 120mA Linear Regulator
TC1189 MAX8863/64 120mA Linear Regulator with Auto Discharge	TC1189	MAX8863/64 120mA Linear Regulator with Auto Discharge
TC1223 50mA CMOS LDO with Shutdown	TC1223	50mA CMOS LDO with Shutdown
TC1224 100mA CMOS LDO with Shutdown	TC1224	100mA CMOS LDO with Shutdown
TC1262 500mA Fixed Output CMOS LDO	TC1262	500mA Fixed Output CMOS LDO
TC1263 500mA Fixed Output CMOS LDO with Shutdown	TC1263	500mA Fixed Output CMOS LDO with Shutdown
TC1264 800mA Fixed Output CMOS LDO with Shutdown	TC1264	800mA Fixed Output CMOS LDO with Shutdown
TC1265 800mA Fixed Output CMOS LDO with Shutdown	TC1265	800mA Fixed Output CMOS LDO with Shutdown
TC1266 EOL	TC1266	EOL
TC1267 EOL	TC1267	EOL
TC1268 EOL	TC1268	EOL
TC1269 300mA CMOS LDO w/ Shutdown and Vref Bypass	TC1269	300mA CMOS LDO w/ Shutdown and Vref Bypass
TC1300 300mA CMOS LDO with Microcontroller Reset	TC1300	300mA CMOS LDO with Microcontroller Reset
TC1301A Dual LDO with Microcontroller Reset Function	TC1301A	Dual LDO with Microcontroller Reset Function
TC1301B Dual LDO with Microcontroller Reset Function	TC1301B	Dual LDO with Microcontroller Reset Function
TC1302A Low Quiescent Current Dual Output LDO	TC1302A	Low Quiescent Current Dual Output LDO
TC1302B Low Quiescent Current Dual Output LDO	TC1302B	Low Quiescent Current Dual Output LDO
TC1305	TC1305
TC1306	TC1306
TC1307 Four-Channel CMOS LDO with Select Mode, Shutdown and Independent Reset	TC1307	Four-Channel CMOS LDO with Select Mode, Shutdown and Independent Reset
TC2014 50mA CMOS LDO w/ Shutdown and Vref Bypass	TC2014	50mA CMOS LDO w/ Shutdown and Vref Bypass
TC2015 100mA CMOS LDO with Shutdown and Vref Bypass	TC2015	100mA CMOS LDO with Shutdown and Vref Bypass
TC2054 50mA CMOS LDO with Shutdown and Error Output	TC2054	50mA CMOS LDO with Shutdown and Error Output
TC2055 100mA CMOS LDO with Shutdown and Error Output	TC2055	100mA CMOS LDO with Shutdown and Error Output
TC2117 800mA Fixed Low Dropout Positive Regulator	TC2117	800mA Fixed Low Dropout Positive Regulator
TC2185 150mA CMOS LDO w/ Shutdown and Vref Bypass	TC2185	150mA CMOS LDO w/ Shutdown and Vref Bypass
TC2186 150mA CMOS LDO with Shutdown and Error Output	TC2186	150mA CMOS LDO with Shutdown and Error Output
TC55 EOL	TC55	EOL
TC57 EOL	TC57	EOL
TC59 Low Dropout Negative Output Voltage Regulator	TC59	Low Dropout Negative Output Voltage Regulator

AN761

Silicon Products

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