Fremont Micro Devices FT531xx Ultra Low Noise, High PSRR, 250mA LDO FEATURES DESCRIPTION ¾ Ultra-Low Noise for RF Application The FT531xx is designed for portable RF and ¾ Ultra-Fast Response in Line/Load Transient wireless applications with demanding performance ¾ Quick Start-Up (Typically 100uS) and space requirements. The FT531xx performance is ¾ Low Quiescent Current: 36uA optimized for battery powered systems to deliver ¾ Less than 0.1uA Standby Current When ultra low noise and low quiescent current. Regulator Shutdown ground current increases only slightly in dropout, ¾ Low Dropout Voltage: 120mV @ 100mA further prolonging the battery life. ¾ Wide Operating Voltage Ranges : 2.5V to 6V ¾ TTL-Logic-Controlled Shutdown Input The FT531xx also works with low-ESR ceramic ¾ Low Temperature Coefficient capacitors, reducing the amount of board space ¾ Current Limiting Protection necessary ¾ Only 1uF Output Capacitor Required hand-held wireless devices. The FT531xx consumes ¾ High Power Supply Rejection Ratio less than 0.1uA in shutdown mode and has fast ¾ ROHS Compliant and 100% Lead (Pb)-Free turn-on time less than 100uS. The other features ¾ Custom Voltage Available include low dropout voltage, high output accuracy, ¾ Custom Options for CE Logic and Build-in current limiting protection, and high ripple rejection Pull-up/down Available ratio. The FT531xx is available in the 5-lead of for power applications, critical in SOT-23-5(L), SC-70 and the 3-lead of SOT-23-3(L), SOT-89-3(L), SOT-23 packages. APPLLICATIONS ¾ CDMA/GSM Cellular Handsets ¾ Battery-Powered Equipment ¾ Laptop, Palmtops, Notebook Computers ¾ Hand-Held Instruments ¾ PCMCIA Cards ¾ Portable Information Appliances www.fremontmicro.com Page 1 of 23 DS531-A8 Fremont Micro Devices FT531xx TYPICAL APPLICATION CIRCUIT Typical Application Circuit ABSOLUTE MAXIMUM RATINGS Supply Input Voltage --------------------------------------------------------------------------------------- 6V Power Dissipation, PD@ TA=27 ℃ SOT-23-5(L) ----------------------------------------------------------------------------------------------- 400mW SOT-23-3(L) ----------------------------------------------------------------------------------------------- 400mW SOT-89-3(L) ----------------------------------------------------------------------------------------------- 600mW SC-70 ---------------------------------------------------------------------------------------------------- 300mW SOT-23 --------------------------------------------------------------------------------------------------- 250mW Package Thermal Resistance ℃/W ℃/W SOT-89-3(L)------------------------------------------------------------------------------------------------ 170℃/W SC-70 ------------------------------------------------------------------------------------------------------- 330℃/W SOT-23 ----------------------------------------------------------------------------------------------------- 380℃/W Lead Temperature (Soldering, 10sec.) ----------------------------------------------------------------- 260℃ Storage Temperature Range -------------------------------------------------------------------------－60℃ to 150℃ SOT-23-5(L)------------------------------------------------------------------------------------------------ 250 SOT-23-3(L)------------------------------------------------------------------------------------------------ 250 ESD Susceptibility HBM(Human Body Mode) -------------------------------------------------------------------------------4kV MM(Machine Mode) --------------------------------------------------------------------------------------200V * Stresses exceed those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Functional operation of the device at conditions beyond those listed in the specification is not guaranteed. Prolonged exposure to extreme conditions may affect device reliability or functionality. www.fremontmicro.com Page 2 of 23 DS531-A8 Fremont Micro Devices FT531xx PIN CONFIGURATION TERMINAL FUNCTION Pin Name Pin Function Chip Enable (Active High). No Pull-Down Resistor Build-in EN For package SOT-23-3(L) ,SOT-89-3(L) and SOT-23 ，the EN is internally connected to VIN VIN Power Input Voltage VOUT Output Voltage NC No Connection GND Ground www.fremontmicro.com Page 3 of 23 DS531-A8 Fremont Micro Devices FT531xx ORDERING INFORMATION FT531 ①② DESIGNATOR SYMBOL OUTPUT VOLTAGE ① A 1.2V B 1.3V C 1.5V D 1.8V E 2.5V F 2.7V G 2.8V H 2.85V I 3.0V J 3.3V K 3.6V L 4.2V DESIGNATOR SYMBOL ② www.fremontmicro.com PIN CONFIGURATION PACKAGE TYPE a SOT-23-5A b SOT-23-5B c SOT-23-5C d SC-70A e SC-70B f SC-70C g SOT-23-3A SOT-23-3(L) h SOT-23A SOT-23 i SOT-89-3A SOT-89-3(L) Page 4 of 23 SOT-23-5(L) SC-70 / SOT-353 DS531-A8 Fremont Micro Devices FT531xx MARKING RULE c Represent Product Series SYMBOL PRODUCT SERIES 6 FT531xx d Represent Output Voltage and operating temperature range ℃ ~ 85℃. G represent the output voltage is 2.8V, operating temperature is –40 ③③③ For internal reference. BLOCK DIAGRAM Block Diagram www.fremontmicro.com Page 5 of 23 DS531-A8 Fremont Micro Devices FT531xx ELECTRICAL CHARACTERISTICS Vout=1.2V; En=Vin=2.5V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=2.5V 250 300 --- mA Ishort Vin=2.5V --- 20 --- mA Current Limiter 2.5V~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 400 --- mV Supply Current Iq Vin=2.5V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 30 --- uVrms Ripple PSRR@1k Vin=2.5VDC+1Vp-pAC, --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 6 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=1.3V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 380 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 30 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 7 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=1.5V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 300 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 30 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 8 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=1.8V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 200 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 30 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 9 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=2.5V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 140 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 40 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 10 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=2.7V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 130 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 40 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 11 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=2.8V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 120 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 40 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 12 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=2.85V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 120 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 40 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 13 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=3.0V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 120 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 40 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 14 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=3.3V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 120 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 40 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 15 of 23 DS531-A8 Fremont Micro Devices FT531xx Vout=3.6V; En=Vin=(Vout+1)V; Cout=1uF unless otherwise noted PARAMETER Output Voltage Accuracy SYMBOL CONDITIONS MIN TYP MAX UNITS Vout Iout=1mA -2 --- +2 % Imax Vin=Vout+1V 250 300 --- mA Ishort Vin=Vout+1V --- 20 --- mA Current Limiter (Vout+1.0V)~6V --- 0.01 0.3 %/V Load Regulation △Vline △Vload 1mA≤Iout≤100mA --- 10 --- mV Dropout Voltage Vdrop Iout=100mA --- 120 --- mV Supply Current Iq Vin=(Vout+1)V,Iout=0mA --- 36 --- uA Standby Current Istby Shut down --- 0.01 1 uA Line Regulations Temperature △Vout/ (△Temp* Coefficient Vout) -40°C≤Temp≤85°C --- 100 --- ppm/ eNO 10Hz~100kHz --- 40 --- uVrms Ripple PSRR@1k Vin=Vout+1VDC+1Vp-pAC --- 72 --- Rejection Rate PSRR@10k Iout=30mA --- 60 --- --- 0 100 nA Output Noise Voltage EN Input Bias Current Iout=30mA Ien ℃ dB VL --- --- --- 0.3 V VH --- 1.2 --- 6 V EN Threshold * Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. www.fremontmicro.com Page 16 of 23 DS531-A8 Fremont Micro Devices FT531xx TYPICAL PERFORMANCE CHARACTERISTICS FT531I Vin=4.0V, Vout=3.0V, Co=1uF, temp=27 ℃ unless otherwise noted Quiescent Current vs. Temp Quiescent Current (uA) 50 45 40 35 30 25 20 -40 -20 0 20 40 Temp(C) 60 80 100 PSRR 0 -10 0mA 1mA 10mA 30mA -20 )0 2B-30 d(-40 RR SP-50 -60 -70 -80 0.01 0.1 1 10 Frequency(kHz) www.fremontmicro.com 100 1000 Page 17 of 23 DS531-A8 Fremont Micro Devices www.fremontmicro.com FT531xx Page 18 of 23 DS531-A8 Fremont Micro Devices FT531xx PAKAGING INFORMATION SOT-23-5L www.fremontmicro.com Page 19 of 23 DS531-A8 Fremont Micro Devices FT531xx SOT-23-3L www.fremontmicro.com Page 20 of 23 DS531-A8 Fremont Micro Devices FT531xx SOT-89-3L www.fremontmicro.com Page 21 of 23 DS531-A8 Fremont Micro Devices FT531xx SC-70 www.fremontmicro.com Page 22 of 23 DS531-A8 Fremont Micro Devices FT531xx SOT-23 www.fremontmicro.com Page 23 of 23 DS531-A8