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AN776

Title	Title DC Performance Comparisons of CMOS vs Bipolar LDOs When Operating in "Dropout" (Vin = Nominal Vout) Mode (list devices)
Name	Name AN776
Date	Date 06/24/2015
Product Categories	Product Categories Power Management ICs / Battery Management Power Management ICs / Voltage Detectors
Description	Description More and more, battery operated systems are requiring lower terminal voltages to power internal circuits. Multi-cell designs are rapidly migrating to single-cell architectures to reduce system cost. A prime example of this system type is digital cameras, which often use a single-cell 3.6V Li-Ion battery for their power source. Digital cameras contain high-speed memory ICs, which require tight voltage regulation at moderate loads to meet the required timing parameters of the system. Precision low dropout (LDO) regulator devices can be used to meet these requirements but in doing so, the LDO regulators must be able to successfully operate in the ?dropout? mode as the battery discharges. Dropout mode is entered when the input voltage (from the battery source) is equal to the ?nominal output voltage? of the LDO; for example a 3.3V LDO enters dropout mode when its input voltage at the VIN pin is equal to 3.3V. Minimal output voltage droop and minimal LDO power dissipation are critical to meeting various system performance parameters and extending the life of the battery.

Silicon Products

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