Data Sheet DUAL LDO REGULATORS AP2401 General Description Features The AP2401 series are dual positive voltage regulator ICs fabricated by CMOS process. Each of these ICs consists of a voltage reference, two error amplifiers, two resistor networks for setting output voltages. Each channel has a current limit circuit for current protection. · The AP2401 series feature high ripple rejection, low dropout voltage, low noise, high output voltage accuracy, and low current consumption which make them ideal for use in various battery-powered devices. The chip enable function allows the output of each channel to be turned on/off independently, greatly reducing the power consumption. · · · · · · · Applications · · · · · The AP2401 series have 1.8V/2.5V, 1.8V/2.8V, 1.8V/ 3.3V and 2.8V/1.8V versions. The AP2401 are available in standard SOT-23-6 package. Maximum Output Current/Channel: More Than 150mA (300mA Limit) High Output Voltage Accuracy: ±2% Low Quiescent Current/Channel: 25µA Typical Low Standby Current: 0.1µA Typical High PSRR: 70dB Typical （f=1kHz) Extremely Low Noise: 30µVrms (10Hz to 100kHz) Operating Temperature: -40 to 85oC Compatible with Low ESR Ceramic Capacitor · Mobile Phones, Cordless Phones Wireless Communication Equipment Portable Games Cameras, Video Recorders Sub-board Power Supplies for Telecom Equipment Battery Powered Equipment SOT-23-6 Figure 1. Package Type of AP2401 Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 1 Data Sheet DUAL LDO REGULATORS AP2401 Pin Configuration K Package (SOT-23-6) CE1 1 6 VOUT1 VIN 2 5 GND CE2 3 4 VOUT2 Figure 2. Pin Configuration of AP2401 (Top View) Pin Description Pin Number Pin Name Function 1 CE1 On/Off control 1, logic high=enable; logic low=shutdown 2 VIN Input voltage 3 CE2 On/Off control 2, logic high=enable; logic low=shutdown 4 VOUT2 5 GND 6 VOUT1 Output voltage 2 Ground Output voltage 1 Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 2 Data Sheet DUAL LDO REGULATORS AP2401 Functional Block Diagram CE1 1 On/Off Control Error Amplifier 1 6 Current Limit VR1 Each Circuit VIN GND 2 5 VR2 Each Circuit CE2 VOUT1 3 Error Amplifier 2 Current Limit 4 VOUT2 On/Off Control Voltage Reference Figure 3. Functional Block Diagram of AP2401 Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 3 Data Sheet DUAL LDO REGULATORS AP2401 Ordering Information AP2401 E1: Lead Free Circuit Type TR: Tape and Reel B: Active High (Without Built-in Pull-down Resistor) Package 1: Fixed Output 1.8V (Channel 1) 3: Fixed Output 2.8V (Channel 1) K: SOT-23-6 1: Fixed Output 1.8V (Channel 2) 2: Fixed Output 2.5V (Channel 2) 3: Fixed Output 2.8V (Channel 2) 4: Fixed Output 3.3V (Channel 2) Package SOT-23-6 Temperature Range -40 to 85oC Packing Type Condition Output Voltages Active High Without Built-in Pull-down Resistor 1.8V/2.5V AP2401B12KTR-E1 E9P Tape & Reel Active High Without Built-in Pull-down Resistor 1.8V/2.8V AP2401B13KTR-E1 E9Q Tape & Reel Active High Without Built-in Pull-down Resistor 1.8V/3.3V AP2401B14KTR-E1 E9R Tape & Reel Active High Without Built-in Pull-down Resistor 2.8V/1.8V AP2401B31KTR-E1 E8R Tape & Reel Part Number Marking ID BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 4 Data Sheet DUAL LDO REGULATORS AP2401 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Input Voltage VIN 6.5 V Enable Input Voltage VCE 6.5 V IOUT1+IOUT2 700 mA Power Dissipation (TA=25oC) PD 250 mW Junction Temperature TJ 150 oC TSTG -65 to 150 TLEAD 260 oC ESD 3000 V Output Current (TA=25oC) Storage Temperature Range Lead Temperature (Soldering, 10sec) ESD (Human Body Model) o C Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Input Voltage VIN Operating Junction Temperature Range TJ Min -40 Sep. 2007 Rev. 1. 2 Max Unit 6 V 85 oC BCD Semiconductor Manufacturing Limited 5 Data Sheet DUAL LDO REGULATORS AP2401 Electrical Characteristics (Channel 1/Channel 2: VIN=VOUT+1V, TJ=25oC, CIN=1µF, COUT=1µF, unless otherwise specified.) Parameter Output Voltage Accuracy Input Voltage Maximum Output Current Symbol ∆VOUT/VOUT Conditions Variation from specified VOUT, IOUT=30mA Line Regulation VRLINE VOUT+1V≤VIN≤6V IOUT=30mA, VCE=VIN Power Supply Rejection Ratio PSRR % 6 V mA mV 0.01 0.2 %/V VOUT=1.8V 60 70 VOUT=2.5V 45 55 VOUT=2.8V 45 55 VOUT=3.3V 35 45 VOUT=1.8V 175 195 VOUT=2.5V 135 160 VOUT=2.8V 135 160 VOUT=3.3V 125 150 VCE=VIN=VOUT+1V, IOUT=0mA 25 45 µA VCE in OFF mode 0.1 1 µA Ripple 0.5Vp-p, f=1kHz VIN=VOUT+1V, IOUT=30mA 70 dB ±100 ppm/oC IOUT=100mA ISTD 2 60 VDROP Standby Current Unit 15 IOUT=30mA IQ Max 150 Load Regulation Output Voltage Temperature Coefficient -2 IOUT 1mA≤IOUT≤100mA Quiescent Current Typ VIN VRLOAD Dropout Voltage Min (∆VOUT/VOUT)/∆T IOUT=30mA, -40oC≤TJ≤85oC mV Current Limit ILIMIT VCE=VIN 300 mA Short Circuit Current ISHORT VCE=VIN, VOUT=0 30 mA RMS Output Noise VNOISE TA=25oC 10Hz ≤f≤100kHz 30 µVrms CE "High" Voltage CE input voltage "High" CE "Low" Voltage CE input voltage "Low" Sep. 2007 Rev. 1. 2 1.3 6 V 0.25 V BCD Semiconductor Manufacturing Limited 6 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics 3.0 2.0 1.8 2.5 1.4 Output Voltage (V) Output Voltage (V) 1.6 1.2 1.0 0.8 1.8V (Channel 1) o TJ=-40 C 0.6 2.5V (Channel 2) o TJ=-40 C 2.0 o TJ=25 C 1.5 o TJ=85 C 1.0 o 0.4 TJ=25 C 0.2 TJ=85 C 0.5 o 0.0 0.0 0 50 100 150 200 250 300 350 400 0 50 100 200 250 300 350 400 Figure 5. Output Voltage vs. Output Current Figure 4. Output Voltage vs. Output Current 3.5 3.0 3.0 Output Voltage (V) 2.5 Output Voltage (V) 150 Output Current (mA) Output Current (mA) 2.0 1.5 2.8V (Channel 2) o TJ=-40 C 1.0 2.5 2.0 1.5 3.3V (Channel 2) o TJ=-40 C 1.0 o o TJ=25 C 0.5 TJ=25 C 0.5 o o TJ=85 C TJ=85 C 0.0 0.0 0 50 100 150 200 250 300 350 0 400 Output Current (mA) 50 100 150 200 250 300 350 400 Output Current (mA) Figure 7. Output Voltage vs. Output Current Figure 6. Output Voltage vs. Output Current Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 7 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 3.0 2.0 1.8 2.5 1.8V (Channel 1) o TJ=25 C 1.4 Output Voltage (V) Output Voltage (V) 1.6 VIN=2.1V 1.2 VIN=4V 1.0 VIN=6V 0.8 0.6 0.4 2.5V (Channel 2) o TJ=25 C 2.0 VIN=2.8V 1.5 VIN=4V VIN=6V 1.0 0.5 0.2 0.0 0.0 0 50 100 150 200 250 300 350 400 0 450 50 100 150 200 250 300 350 400 Output Current (mA) Output Current (mA) Figure 9. Output Voltage vs. Output Current Figure 8. Output Voltage vs. Output Current 3.0 3.2 2.8 Output Voltage (V) Output Voltage (V) 2.5 2.0 1.5 2.8V (Channel 2) o TJ=25 C 1.0 VIN=3.1V VIN=3.6V 2.0 VIN=4V 1.6 VIN=6V 1.2 0.8 VIN=4V 0.5 3.3V (Channel 2) o TJ=25 C 2.4 0.4 VIN=6V 0.0 0.0 0 50 100 150 200 250 300 350 0 400 50 100 150 200 250 300 350 400 Output Current (mA) Output Current (mA) Figure 11. Output Voltage vs. Output Current Figure 10. Output Voltage vs. Output Current Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 8 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 3.0 2.0 1.8 2.5 Output Voltage (V) Output Voltage (V) 1.6 1.4 1.2 1.0 1.8V (Channel 1) o TJ=25 C 0.8 0.6 2.0 1.5 2.5V (Channel 2) o TJ=25 C 1.0 IOUT=0mA IOUT=0mA 0.4 IOUT=30mA 0.2 IOUT=100mA IOUT=30mA 0.5 IOUT=100mA 0.0 0.0 0 1 2 3 4 5 0 6 1 2 Input Voltage (V) 4 5 6 Figure 13. Output Voltage vs. Input Voltage Figure 12. Output Voltage vs. Input Voltage 3.0 3.5 3.0 Output Voltage (V) 2.5 Output Voltage (V) 3 Input Voltage (V) 2.0 1.5 2.8V (Channel 2) o TJ=25 C 1.0 IOUT=0mA 2.5 2.0 3.3V (Channel 2) o TJ=25 C 1.5 1.0 IOUT=0mA IOUT=30mA 0.5 IOUT=30mA 0.5 IOUT=100mA 0.0 IOUT=100mA 0.0 0 1 2 3 4 5 6 0 Input Voltage (V) 1 2 3 4 5 6 Input Voltage (V) Figure 15. Output Voltage vs. Input Voltage Figure 14. Output Voltage vs. Input Voltage Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 9 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 350 450 400 1.8V (Channel 1) o TJ=-40 C o TJ=25 C 300 2.5V (Channel 2)) o TJ=-40 C 300 Dropout Voltage (mV) Dropout Voltage (mV) 350 o TJ=85 C 250 200 150 o 250 TJ=25 C o TJ=85 C 200 150 100 100 50 50 0 0 0 25 50 75 100 125 0 150 25 75 100 125 150 Output Current (mA) Output Current (mA) Figure 17. Dropout Voltage vs. Output Current Figure 16. Dropout Voltage vs. Output Current 350 350 2.8V (Channel 2) o TJ=-40 C o TJ=25 C 250 3.3V (Channel 2) o TJ=-40 C 300 Dropout Voltage (mV) 300 Dropout Voltage (mV) 50 o TJ=85 C 200 150 o TJ=25 C 250 o TJ=85 C 200 150 100 100 50 50 0 0 0 25 50 75 100 125 0 150 25 50 75 100 125 150 Output Current (mA) Output Current (mA) Figure 19. Dropout Voltage vs. Output Current Figure 18. Dropout Voltage vs. Output Current Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 10 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 2.56 1.84 1.83 2.54 Output Voltage (V) Output Voltage (V) 1.82 1.81 1.80 1.79 1.78 1.8V (Channel 1) VIN=2.8V 1.77 IOUT=30mA 2.52 2.50 2.48 2.5V (Channel 2) VIN=3.5V 2.46 IOUT=30mA 2.44 1.76 -25 0 25 50 -25 75 0 2.84 3.32 Output Voltage (V) Output Voltage (V) 3.34 2.82 2.80 2.78 2.8V (Channel 2) VIN=3.8V 50 3.28 3.26 3.3V (Channel 2) VIN=4.3V IOUT=30mA 3.22 -40 2.74 25 3.30 3.24 IOUT=30mA 0 75 Figure 21. Output Voltage vs. Junction Temperature 2.86 -25 50 Junction Temperature ( C) Figure 20. Output Voltage vs. Junction Temperature 2.76 25 o o Junction Temperature ( C) 75 -20 0 20 40 60 80 o o Junction Temperature ( C) Junction Temperature ( C) Figure 22. Output Voltage vs. Junction Temperature Figure 23. Output Voltage vs. Junction Temperature Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 11 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 90 90 1.8V (Channel 1) o TJ=-40 C o TJ=25 C 60 2.5V (Channel 2) o TJ=-40 C 75 Quiescent Current (µA) Quiescent Current (µA) 75 o TJ=85 C 45 30 15 o TJ=25 C o TJ=85 C 60 45 30 15 0 0 0 1 2 3 4 5 6 0 1 2 Input Voltage (V) Figure 24. Quiescent Current vs. Input Voltage 4 5 6 Figure 25. Quiescent Current vs. Input Voltage 90 90 2.8V (Channel 2) o TJ=-40 C 75 3.3V (Channel 2) o TJ=-40 C 75 o o TJ=25 C Quiescent Current (µA) Quiescent Current (µA) 3 Input Voltage (V) o TJ=85 C 60 45 30 TJ=25 C o TJ=85 C 60 45 30 15 15 0 0 0 1 2 3 4 5 0 6 1 2 3 4 5 6 Input Voltage (V) Input Voltage (V) Figure 27. Quiescent Current vs. Input Voltage Figure 26. Quiescent Current vs. Input Voltage Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 12 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 31.0 30.0 29.5 28.5 2.5V (Channel 2) VIN=3.5V 30.0 IOUT=0 Quiescent Current (µA) Quiescent Current (µA) 30.5 1.8V (Channel 1) VIN=2.8V 29.0 28.0 27.5 27.0 26.5 26.0 25.5 IOUT=0 29.5 29.0 28.5 28.0 27.5 27.0 25.0 26.5 24.5 24.0 -25 0 25 50 26.0 75 -25 o 25 50 75 Junction Temperature ( C) Figure 29. Quiescent Current vs. Junction Temperature Figure 28. Quiescent Current vs. Junction Temperature 32.0 31.0 30.5 31.5 2.8V (Channel 2) VIN=3.8V 30.0 IOUT=0 29.5 3.3V (Channel 2) VIN=4.3V 31.0 Quiescent Current (µA) Quiescent Current (µA) 0 o Junction Temperature ( C) 29.0 28.5 28.0 27.5 IOUT=0 30.5 30.0 29.5 29.0 28.5 27.0 28.0 26.5 27.5 27.0 26.0 -25 0 25 50 -25 75 0 25 50 75 o Junction Temperature ( C) o Junction Temperature ( C) Figure 31. Quiescent Current vs. Junction Temperature Figure 30. Quiescent Current vs. Junction Temperature Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 13 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 7 VIN (1V/Div) 1.8V (Channel 1) 5 4 3 ∆VOUT (50mV/Div) 50 0 -50 5 4 50 0 -50 -100 -100 Time (40µs/Div) Time (40µs/Div) Figure 33. Line Transient Figure 32. Line Transient (Conditions: IOUT=30mA, CIN=100nF, COUT=1µF) (Conditions: IOUT=30mA, CIN=100nF, COUT=1µF) 7 6 VIN (1V/Div) 2.8V (Channel 2) 5 4 ∆VOUT1 (100mV/Div) VIN (1V/Div) 7 ∆VOUT (50mV/Div) 2.5V (Channel 2) 6 50 0 -50 -100 Time (40µs/Div) 1.8V/2.5V (Channel 1/Channel 2) 6 5 4 ∆VOUT2 100 ∆VOUT1 0 0 -50 -100 -100 -200 -150 Time (40µs/Div) Figure 34. Line Transient Figure 35. Line Transient (Conditions: IOUT=30mA, CIN=100nF, COUT=1µF) (Conditions: channel 1 and 2 on, IOUT=30mA, CIN=100nF, COUT=1µF) Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 14 ∆VOUT2 (50mV/Div) ∆VOUT (50mV/Div) VIN (1V/Div) 6 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 100 ∆VOUT (50mV/Div) 6 5 4 ∆VOUT2 100 0 ∆VOUT1 -50 0 -100 -100 -200 -150 IOUT (50mA/Div) 1.8V/2.5V (Channel 1/Channel 2) ∆VOUT2 (50mV/Div) ∆VOUT1 (100mV/Div) VIN (1V/Div) 7 1.8V (Channel 1) 50 0 -50 100 50 0 -50 Time (40µs/Div) Time (100µs/Div) Figure 36. Line Transient Figure 37. Load Transient (Conditions: channel 1 and 2 on, IOUT=30mA, CIN=COUT=1µF) (Conditions: IOUT=10 to 100mA, CIN=COUT=1µF) ∆VOUT (50mV/Div) 2.5V (Channel 2) 50 0 -50 IOUT (50mA/Div) IOUT (50mA/Div) ∆VOUT (50mV/Div) 100 100 50 0 100 2.8V (Channel 2) 50 0 -50 100 50 0 -50 -50 Time (100µs/Div) Time (100µs/Div) Figure 38. Load Transient Figure 39. Load Transient (Conditions: IOUT=10 to 100mA, CIN=COUT=1µF) (Conditions: IOUT=10 to 100mA, CIN=COUT=1µF) Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 15 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) ∆VOUT1 (20mV/Div) 50 0 -50 IOUT2 (50mA/Div) ∆VOUT (50mV/Div) IOUT (50mA/Div) 3.3V (Channel 2) 100 50 0 -50 0 -20 300 1.8V/2.5V (Channel 1/Channel 2) 200 ∆VOUT1 100 -40 0 ∆VOUT2 ∆VOUT2 (100mV/Div) 20 100 100 50 0 -50 Time (100µs/Div) Time (100µs/Div) Figure 40. Load Transient Figure 41. Cross Talk 1 (Conditions: channel 1 and 2 on, IOUT1=30mA, IOUT2=10 to 100mA, CIN=COUT=1µF) -100 -200 40 20 0 ∆VOUT2 100 50 0 20 0 -20 1.8V/2.8V (Channel 1/Channel 2) ∆VOUT1 300 200 100 0 -40 ∆VOUT2 100 50 0 -50 -50 Time (100µs/Div) Time (100µs/Div) Figure 43. Cross Talk 3 (Conditions: channel 1 and 2 on, IOUT1=30mA, IOUT2=10 to 100mA, CIN=COUT=1µF) Figure 42. Cross Talk 2 (Conditions: channel 1 and 2 on, IOUT1=10 to 100mA, IOUT2=30mA, CIN=COUT=1µF) Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 16 ∆VOUT2 (100mV/Div) ∆VOUT1 60 ∆VOUT1 (20mV/Div) 0 1.8V/2.5V (Channel 1/Channel 2) ∆VOUT2 (20mV/Div) 100 IOUT2 (50mA/Div) IOUT2 (50mA/Div) ∆VOUT1 (100mV/Div) (Conditions: IOUT=10 to 100mA, CIN=COUT=1µF) Data Sheet DUAL LDO REGULATORS AP2401 0 ∆VOUT2 100 50 0 0 -20 ∆VOUT2 100 50 0 Time (100µs/Div) ∆VOUT2 40 20 0 ∆VOUT1 (50mV/Div) ∆VOUT1 60 ∆VOUT2 (20mV/Div) -200 1.8V/3.3V (Channel 1/Channel 2) Figure 45. Cross Talk 5 (Conditions: channel 1 and 2 on, IOUT1=30mA, IOUT2=10 to 100mA, CIN=COUT=1µF) IOUT1 (100mA/Div) IOUT1 (50mA/Div) ∆VOUT1 (100mV/Div) Figure 44. Cross Talk 4 (Conditions: channel 1 and 2 on, IOUT1=10 to 100mA, IOUT2=30mA, CIN=COUT=1µF) -100 100 0 -40 Time (100µs/Div) 0 200 -50 -50 100 ∆VOUT1 300 ∆VOUT2 (100mV/Div) 20 1.8V/3.3V (Channel 1/Channel 2) 100 50 0 50 0 -50 -100 1.8V/2.5V (Channel 1/Channel 2) ∆VOUT1 100 50 0 ∆VOUT2 100 300 IOUT1 200 0 -100 100 IOUT2 0 -200 -50 150 ∆VOUT2 (50mV/Div) -200 40 20 IOUT2 (100mA/Div) -100 ∆VOUT1 60 ∆VOUT1 (20mV/Div) 0 1.8V/2.8V (Channel 1/Channel 2) IOUT2 (50mA/Div) 100 ∆VOUT2 (20mV/Div) IOUT1 (50mA/Div) ∆VOUT1 (100mV/Div) Typical Performance Characteristics (Continued) Time (100µs/Div) Time (100µs/Div) Figure 46. Cross Talk 6 (Conditions: channel 1 and 2 on, IOUT1=10 to 100mA, IOUT2=30mA, CIN=COUT=1µF) Figure 47. Cross Talk 7 (Conditions: channel 1 and 2 on, IOUT1=IOUT2=10 to 100mA, CIN=COUT=1µF) Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 17 Data Sheet DUAL LDO REGULATORS AP2401 50 0 -100 ∆VOUT2 100 IOUT1 300 200 0 100 -100 IOUT2 0 -200 0 0 ∆VOUT2 100 300 IOUT1 0 Figure 48. Cross Talk 8 100 -100 IOUT2 0 -200 VOUT1 3 VOUT2 2 -2 1 -3 0 ESR of Output Capacitor (Ω) 0 VOUT2 (1V/Div) VCE1/VCE2 (1V/Div) VOUT1 (1V/Div) CIN=COUT=1µF) 100 1 -1 Figure 49. Cross Talk 9 (Conditions: channel 1 and 2 on, IOUT1=IOUT2=10 to 100mA, 1.8V/2.8V (Channel 1/Channel 2) 0 200 Time (100µs/Div) (Conditions: channel 1 and 2 on, IOUT1=IOUT2=10 to 100mA, CIN=COUT=1µF) 2 50 -100 Time (100µs/Div) 3 100 ∆VOUT1 -50 ∆VOUT2 (50mV/Div) -50 100 150 1.8V/3.3V (Channel 1/Channel 2) IOUT2 (100mA/Div) ∆VOUT1 50 ∆VOUT1 (50mV/Div) 0 150 IOUT1 (100mA/Div) 1.8V/2.8V (Channel 1/Channel 2) ∆VOUT2 (50mV/Div) 50 IOUT2 (100mA/Div) IOUT1 (100mA/Div) ∆VOUT1 (50mV/Div) Typical Performance Characteristics (Continued) 10 1 Stable Area 0.1 0.01 0 25 50 75 100 125 150 175 200 Output Current (mA) Time (10µs/Div) Figure 50. Enable Voltage vs. Output Voltage (Conditions: VCE1=VCE2=0 to 2V, IOUT=0mA, CIN=COUT=1µF) Sep. 2007 Rev. 1. 2 Figure 51. ESR vs. Output Current BCD Semiconductor Manufacturing Limited 18 Data Sheet DUAL LDO REGULATORS AP2401 Typical Performance Characteristics (Continued) 100 100 1.8V (Channel 1) VIN=2.8V 80 IOUT=30mA 70 COUT=1µF 60 50 40 80 IOUT=30mA 70 COUT=1µF 60 50 40 30 30 20 20 10 10 0 10 100 1k 10k 2.5V (Channel 2) VIN=3.5V 90 PSRR (dB) PSRR (dB) 90 0 10 100k 100 Figure 52. PSRR vs. Frequency 100k 100 2.8V (Channel 2) VIN=3.8V 90 80 IOUT=30mA 70 COUT=1µF 60 50 40 80 IOUT=30mA 70 COUT=1µF 60 50 40 30 30 20 20 10 10 100 1k 10k 3.3V (Channel 2) VIN=4.3V 90 PSRR (dB) PSRR (dB) 10k Figure 53. PSRR vs. Frequency 100 0 10 1k Frequency (Hz) Frequency (Hz) 0 10 100k 100 1k 10k 100k Frequency (Hz) Frequency (Hz) Figure 54. PSRR vs. Frequency Figure 55. PSRR vs. Frequency Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 19 Data Sheet DUAL LDO REGULATORS AP2401 Typical Application AP2401B12 CE1 VOUT1 VIN =3.5V VIN VOUT1=1.8V VOUT1 COUT1 VIN GND CE2 VOUT2 1µF CIN 1µF VOUT 2 =2.5V VOUT2 COUT2 1µF Figure 56. Typical Application of AP2401 Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 20 Data Sheet DUAL LDO REGULATORS AP2401 Mechanical Dimensions SOT-23-6 Unit: mm(inch) 0° 2.820(0.111) 8° 3.020(0.119) 0.300(0.012) 0.400(0.016) 5 0.300(0.012) 0.600(0.024) 4 1.500(0.059) 1.700(0.067) 2.650(0.104) 2.950(0.116) 6 0.200(0.008) Pin 1 Dot by Marking 1 2 3 0.700(0.028)REF 0.950(0.037)TYP 0.000(0.000) 0.100(0.004) 1.800(0.071) 2.000(0.079) 0.100(0.004) 0.200(0.008) 1.050(0.041) 1.050(0.041) 1.150(0.045) 1.250(0.049) Sep. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 21 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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