'2001.7.10 SOT23-6 150mA 2ch LDO REGULATORS R5323N SERIES OUTLINE The R5323N Series are voltage regulator ICs with high output voltage accuracy, low supply current, low dropout, and high ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, resistors for setting Output Voltage, a current limit circuit, and a chip enable circuit. These ICs perform with low dropout voltage due to built-in transistor with low ON resistance, and a chip enable function prolongs the battery life of each system. The line transient response and load transient response of the R5323N Series are excellent, thus these ICs are very suitable for the power supply for hand-held communication equipment. The output voltage of these ICs is internally fixed with high accuracy. Since the package for these ICs is SOT-23-6 package, 2ch LDO regulators are included in each package, high density mounting of the ICs on boards is possible. FEATURES z Low Supply Current .................................................. TYP. 90A(VR1,VR2) z Standby Mode ........................................................... TYP. 0.1A(VR1,VR2) z Low Dropout Voltage ................................................ TYP. 0.22V(IOUT=150mA Output Voltage=3.0V Type) z High Ripple Rejection ............................................... TYP. 75dB(VOUT2.4V), TYP. 70dB(VOUT2.5V) (f=1kHz) ........................................................................................... TYP. 65dB(VOUT2.4V), TYP. 60dB(VOUT2.5V) (f=10kHz) z Low Temperature-Drift Coefficient of Output Voltage TYP. 100ppm/C z Excellent Line Regulation ......................................... TYP. 0.02%/V z High Output Voltage Accuracy.................................. 2.0% z Small Package ..........................................................SOT-23-6 z Output Voltage...........................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is possible z Built-in chip enable circuit (A/B: active high) z Built-in fold-back protection circuit ..........................TYP. 40mA (Current at short mode) z Ceramic Capacitor is recommended. (1F or more) APPLICATIONS z z z Power source for handheld communication equipment. Power source for electrical appliances such as cameras, VCRs and camcorders. Power source for battery-powered equipment. Rev. 1.10 -1- BLOCK DIAGRAM R5323NXXXA R5323NXXXB 1 V CE1 OUT1 CE1 6 Error Amp. R1_1 R2_1 Current Limit Error Amp. Vref + Current Limit CE2 4 + R2_1 Current Limit GND VDD 2 5 GND R1_2 Error R2_2 VOUT1 R1_1 Vref 5 VDD 2 - Amp. Error + Vref 1 6 Amp. - R1_2 + Vref 3 VOUT2 CE2 4 Current Limit R2_2 3 VOUT2 SELECTION GUIDE The output voltage, mask option, and the taping type for the ICs can be selected at the user's request. The selection can be made with designating the part number as shown below; R5323NXXXX-XX Part Number a b c Code a b c Rev. 1.10 Contents Setting combination of 2ch Output Voltage (VOUT) : Serial Number for Voltage Setting, Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is possible for each channel. Designation of Mask Option : A version: without auto discharge function at OFF state. B version: with auto discharge function at OFF state. Designation of Taping Type : Ex. TR (refer to Taping Specifications; TR type is the standard direction.) -2- PIN CONFIGURATION SOT-23-6 4 5 6 CE1 GND CE2 (mark side) VOUT1 VDD VOUT2 1 3 2 PIN DESCRIPTION Pin No. Symbol Description 1 VOUT1 Output Pin 1 2 VDD Input Pin 3 VOUT2 Output Pin 2 4 CE2 Chip Enable Pin 2 5 GND Ground Pin 6 CE1 Chip Enable Pin 1 ABSOLUTE MAXIMUM RATINGS Item Rev. 1.10 Symbol Rating Unit Input Voltage VIN 6.5 V Input Voltage(CE Pin) VCE -0.3 ~ VIN+0.3 V Output Voltage VOUT -0.3 ~ VIN+0.3 V Output Current 1 IOUT1 200 mA Output Current 2 IOUT2 200 mA Power Dissipation PD 250 mW Operating Temperature Range Topt -40 ~ 85 C Storage Temperature Range Tstg -55 ~ 125 C -3- ELECTRICAL CHARACTERISTICS R5323NXXXA/B Symbol Item VOUT Output Voltage IOUT Output Current VOUT/IOUT Load Regulation VDIF Dropout Voltage ISS Supply Current Istandby Supply Current (Standby) VOUT/VIN Line Regulation RR Ripple Rejection VIN Input Voltage Output Voltage Temperature Coefficient Short Current Limit CE Pull-down Resistance VOUT/T Ilim RPD VCEH VCEL en CE Input Voltage "H" CE Input Voltage "L" Output Noise Low Output Nch Tr. ON RLOW Resistance (of B version) Note1: f=1kHz, 70dB as to VOUT2.5V Output type. Note2: f=10kHz, 60dB as to VOUT2.5V Output type. Topt=25C Conditions MIN. TYP. MAX. Unit VIN = Set VOUT+1V VOUT VOUT V x0.98 x1.02 1mA IOUT 30mA VIN - VOUT = 1.0V 150 mA VIN = Set VOUT+1V 15 40 mV 1mA IOUT 150mA Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN = Set VOUT+1V 90 120 A VIN = Set VOUT+1V 0.1 1.0 A VCE = GND Set VOUT+0.5V VIN 6V 0.02 0.10 %/V IOUT = 30mA Ripple 0.5Vp-p VIN = Set 75 VOUT+1V *Note1 IOUT = 30mA dB 65 ( In case that VOUT1.7V, *Note2 VIN = Set VOUT+1.2V) 2.0 6.0 V ppm IOUT = 30mA 100 /C -40C Topt 85C VOUT = 0V 40 mA 0.7 2.0 8.0 M 1.5 0.0 V Vrms VCE=0V 60 Dropout Voltage VDIF (V) Condition TYP. 0.38 0.35 IOUT = 150mA 0.33 0.32 0.28 0.22 *Recommended Ceramic capacitor for Output: GRM219R61A105K(Murata) General Example of External Components Ceramic Capacitors: C1608X5R0J105K (TDK) GRM188R60J105K (Murata) Rev. 1.10 0.3 30 Topt = 25C VOUT = 1.5 VOUT = 1.6 VOUT = 1.7 1.8 VOUT 2.0 2.1 VOUT 2.7 2.8 VOUT 4.0 V BW=10Hz to 100kHz ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE Output Voltage VOUT (V) VIN -4- MAX. 0.70 0.65 0.60 0.55 0.50 0.35 TEST CIRCUITS I OUT2 C3 VOUT2 VOUT2 CE2 V OUT 1 1 VOUT C2 V SERIES GND V DD C1 A VOUT1 C2 Fig.1 Standard test Circuit C3 VOUT2 CE1 Fig.2 Supply Current Test Circuit CE2 C3 VOUT2 CE2 R5323N SERIES R5323N SERIES GND I C1 OUT1 V I OUT2 CE2 R5323N CE1 I VOUT2 C3 R5323N SERIES V DD GND I V DD OUT 2 I OUT2b GND VDD V CE1 C1 Pulse IOUT C2 1 I OUT1b I OUT1a VOUT1 PG Generator CE1 C2 Fig.3 Ripple Rejection, Line Transient Response Test Circuit Fig.4 Load Transient Response Test Circuit TYPICAL APPLICATION OUT2 1 C3 2 OUT1 V OUT1 R5323NXXX X SERIES IN VDD CE1 6 GND 5 C1 C2 3 V OUT2 CE2 (External Components) Output Capacitor; Ceramic Type Rev. 1.10 OUT1 -5- 4 SS TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current (Topt=25C) 1.5V(VR1) 1.5V(VR2) 1.6 1.6 1.4 VIN=2.0V VIN=1.8V 1.2 Output Voltage VOUT[V] Output Voltage VOUT[V] 1.4 1 0.8 VIN=2.5V VIN=3.5V 0.6 0.4 0.2 VIN=2.0V 1.2 VIN=1.8V 1 VIN=2.5V 0.8 0.6 0.4 0.2 0 0 0 100 200 300 Output Current IOUT[mA] 400 0 100 200 300 Output Current IOUT[mA] 2.8V(VR1) 3 2.5 2 VIN=3.1V 2.5 VIN=3.1V Output Voltage VOUT[V] Output Voltage VOUT[V] 400 2.8V(VR2) 3 VIN=4.8V 2 VIN=4.8V 1.5 1.5 1 1 0.5 0.5 0 0 0 100 200 300 Output Current IOUT[mA] 0 400 4.0V(VR1) 100 200 300 Output Current IOUT[mA] 400 4.0V(VR2) 5 5 4 4 Output Voltage VOUT[V] Output Voltage VOUT[V] VIN=3.5V VIN=4.3V 3 VIN=6.0V 2 1 0 VIN=4.3V 3 VIN=6.0V 2 1 0 0 Rev. 1.10 100 200 300 Output Current IOUT[mA] 400 0 -6- 100 200 300 Output Current IOUT[mA] 400 2) Output Voltage vs. Input Voltage (Topt=25C) 1.5V(VR2) 1.6 1.6 1.5 1.5 Output Voltage VOUT[V] Output Voltage VOUT[V] 1.5V(VR1) 1.4 1.3 1.2 1mA 30mA 1.1 1.4 1.3 1mA 1.2 30mA 50mA 1.1 50mA 1 1 1 2 3 4 Input Voltage VIN[V] 5 6 1 2 2.9 2.9 2.8 2.8 2.7 2.7 6 2.6 2.6 2.5 2.5 2.4 2.4 2.3 1mA 2.2 30mA 2.1 50mA 2.3 1mA 2.2 30mA 50mA 2.1 2 2 1 2 3 4 Input Voltage VIN[V] 5 1 6 2 4.0V(VR1) 4.2 4 4 3.8 3.6 3.4 1mA 30mA 3.2 3 4 Input Voltage VIN[V] 5 6 4.0V(VR2) 4.2 Output Voltage VOUT[V] Output Voltage VOUT[V] 5 2.8V(VR2) Output Voltage VOUT[V] Output Voltage VOUT[V] 2.8V(VR1) 3 4 Input Voltage VIN[V] 3.8 3.6 3.4 1mA 30mA 3.2 50mA 3 50mA 3 1 Rev. 1.10 2 3 4 Input Voltage VIN[V] 5 6 1 -7- 2 3 4 Input Voltage VIN[V] 5 6 3) Dropout Voltage vs. Temperature 1.5V(VR1) 1.5V(VR2) 0.6 Topt=85C 0.5 -40C 0.4 Topt=85C 0.5 25C 25C Dropout Voltage VDIF(V) Dropout Voltage VDIF(V) 0.6 -40C 0.4 0.3 0.3 0.2 0.2 0.1 0.1 0 0 0 25 50 75 100 125 Output Current IOUT(mA) 150 0 25 2.8V(VR1) 0.4 0.35 Topt=85C 0.3 Dropout Voltage VDIF(V) Dropout Voltage VDIF(V) 0.35 25C -40C 0.25 Topt=85C 0.3 25C -40C 0.25 0.2 0.2 0.15 0.15 0.1 0.1 0.05 0.05 0 0 0 25 50 75 100 125 Output Current IOUT(mA) 0 150 25 4.0V(VR1) 50 75 100 125 Output Current IOUT(mA) 150 4.0V(VR2) 0.4 0.4 0.35 0.35 Topt=85C 25C 0.3 Dropout Voltage VDIF(V) Dropout Voltage VDIF(V) 150 2.8V(VR2) 0.4 -40C 0.25 0.2 0.15 0.1 0.05 Topt=85C 0.3 25C -40C 0.25 0.2 0.15 0.1 0.05 0 0 0 Rev. 1.10 50 75 100 125 Output Current IOUT(mA) 25 50 75 100 Output Current IOUT(mA) 125 150 0 -8- 25 50 75 100 Output Current IOUT(mA) 125 150 4) Output Voltage vs. Temperature 1.5V(VR2) VIN=2.5V IOUT=30mA 1.54 1.54 1.53 1.53 Output Voltage VOUT[V] Output Voltage VOUT[V] 1.5V(VR1) 1.52 1.51 1.50 1.49 1.48 1.47 1.52 1.51 1.50 1.49 1.48 1.47 1.46 1.46 -50 -25 0 25 50 75 Temperature Topt (C) 100 -50 -25 2.8V(VR1) 0 25 50 75 Temperature Topt (C) 100 2.8V(VR2) VIN=3.8V 2.86 IOUT=30mA VIN=3.8V IOUT=30mA 2.86 2.84 Output Voltage VOUT[V] Output Voltage VOUT[V] 2.84 2.82 2.80 2.78 2.82 2.80 2.78 2.76 2.76 2.74 2.74 -50 -25 0 25 50 75 Temperature Topt(C) 4.0V(VR1) 4.08 -50 100 -25 0 25 50 75 Temperature Topt(C) 4.0V(VR2) VIN=5.0V IOUT=30mA 4.08 100 VIN=5.0V IOUT=30mA 4.06 Output Voltage VOUT[V] 4.06 Output Voltage VOUT[V] VIN=2.5V IOUT=30mA 4.04 4.02 4.00 3.98 3.96 4.04 4.02 4.00 3.98 3.96 3.94 3.94 3.92 3.92 -50 Rev. 1.10 -25 0 25 50 75 Temperature Topt(C) -50 100 -9- -25 0 25 50 75 Topt (C) 100 5) Supply Current vs. Input Voltage (Topt=25C) 1.5V 2.8V 80 80 Supply Current ISS[uA] 100 Supply Current ISS[uA] 100 60 40 VR1 40 VR1 20 VR2 20 60 VR2 0 0 0 1 2 3 4 Input Voltage VIN[V] 5 0 6 1 2 3 4 Input Voltage VIN[V] 5 6 4.0V 100 Supply Current ISS[uA] 80 60 40 VR1 20 VR2 0 0 6) 1 2 3 4 Input Voltage VIN[V] 5 6 Supply Current vs. Temperature 1.5V(VR1) 1.5V(VR2) VIN=2.5V 80 80 Supply Current ISS[uA] 100 Supply Current ISS[uA] 100 60 40 20 VIN=2.5V 60 40 20 0 0 -50 Rev. 1.10 -25 0 25 50 75 Temperature Topt (C) -50 100 - 10 - -25 0 25 50 75 Temperature Topt (C) 100 2.8V(VR1) 80 60 40 20 80 60 40 20 0 0 -50 -25 0 25 50 75 Temperature Topt (C) 4V(VR1) 100 -50 100 0 25 50 75 Temperature Topt(C) 100 VIN=5.0V 100 80 60 40 20 80 60 40 20 0 0 -50 -25 0 25 50 75 (C) Temperature Topt -50 100 7) Dropout Voltage vs. Set Output Voltage 0 25 50 75 Temperature Topt (C) 100 VR2 0.6 0.6 0.5 Dropout Voltage VDIF[V] 10mA 30mA 0.4 50mA 150mA 0.3 0.2 0.1 0 0.5 10mA 0.4 50mA 30mA 150mA 0.3 0.2 0.1 0 1 Rev. 1.10 -25 Topt=25C VR1 Dropout Voltage VDIF[V] -25 4V(VR2) VIN=5.0V Supply Current ISS[uA] Supply Current ISS[uA] VIN=3.8V 100 Supply Current ISS[uA] Supply Current ISS[uA] 100 2.8V(VR2) VIN=3.8V 2 3 Set Output Voltage Vreg[V] 4 1 - 11 - 2 3 Set Output Voltage Vreg[V] 4 8) Ripple Rejection vs. Frequency (Topt=25C) 1.5V(VR2) VIN=2.5V+0.5Vp-p COUT= Ceramic 1.0F 1.5V(VR1) VIN=2.5V+0.5Vp-p COUT= Ceramic 1.0F 90 80 80 70 70 Ripple Rejection RR[dB] Ripple Rejection RR[dB] 90 60 50 40 IOUT=1mA 30 IOUT=30mA 20 IOUT=150mA 10 60 50 40 IOUT=1mA 30 IOUT=30mA 20 IOUT=150mA 10 0 0 0.1 1 10 100 0.1 Frequency [kHz] VIN=2.5V+0.5Vp-p 1.5V(VR1) 80 Ripple Rejection RR[dB] Ripple Rejection RR[dB] COUT= Ceramic 2.2F 90 80 70 60 50 40 30 IOUT=1mA 20 IOUT=30mA 10 IOUT=150mA 70 60 50 40 IOUT=1mA 30 IOUT=30mA 20 IOUT=150mA 10 0 0 0.1 1 10 Frequency [kHz] 0.1 100 2.8V(VR1) Ripple Rejection RR[dB] 60 50 40 IOUT=1mA 20 IOUT=30mA 10 IOUT=150mA COUT= Ceramic 1.0F 80 70 30 100 VIN=3.8V+0.5Vp-p 90 COUT= Ceramic 1.0F 80 1 10 Frequency [kHz] 2.8V(VR2) VIN=3.8V+0.5Vp-p 90 Ripple Rejection RR[dB] 100 VIN=2.5V+0.5Vp-p 1.5V(VR2) COUT= Ceramic 2.2F 90 1 10 Frequency [kHz] 0 70 60 50 40 30 IOUT=1mA 20 IOUT=30mA 10 IOUT=150mA 0 0.1 Rev. 1.10 1 10 Frequency [kHz] 100 - 12 - 0.1 1 10 Frequency [kHz] 100 2.8V(VR1) 2.8V(VR2) COUT= Ceramic 2.2F 90 90 80 80 70 70 Ripple Rejection RR[dB] Ripple Rejection RR[dB] VIN=3.8V+0.5Vp-p 60 50 40 30 IOUT=1mA 20 IOUT=30mA 10 IOUT=150mA 0 COUT= Ceramic 2.2F 60 50 40 30 IOUT=1mA 20 IOUT=30mA 10 IOUT=150mA 0 0.1 1 10 Frequency [kHz] 100 0.1 4.0V(VR1) VIN=5.0V+0.5Vp-p 90 80 70 70 Ripple Rejection RR[dB] 80 60 50 40 30 IOUT=1mA 20 IOUT=30mA 10 IOUT=150mA 1 10 Frequency [kHz] 100 4.0V(VR2) VIN=5.0V+0.5Vp-p COUT= Ceramic 1.0F 90 Ripple Rejection RR[dB] VIN=3.8V+0.5Vp-p COUT= Ceramic 1.0F 60 50 40 IOUT=1mA 30 IOUT=30mA 20 IOUT=150mA 10 0 0 0.1 1 10 Frequency [kHz] 100 0.1 4.0V(VR1) Ripple Rejection RR[dB] Ripple Rejection RR[dB] 60 50 40 IOUT=1mA 20 IOUT=30mA 10 IOUT=150mA Rev. 1.10 1 10 Frequency [kHz] 70 60 50 40 30 IOUT=1mA 20 IOUT=30mA 10 IOUT=150mA 0 0 0.1 COUT= Ceramic 2.2F 80 70 30 VIN=5.0V+0.5Vp-p 90 COUT= Ceramic 2.2F 80 100 4.0V(VR2) VIN=5.0V+0.5Vp-p 90 1 10 Frequency [kHz] 0.1 100 - 13 - 1 10 Frequency [kHz] 100 9) Ripple Rejection vs. Input Voltage (DC bias) COUT = Ceramic 1.0F, Topt=25C 2.8V(VR1) 90 80 80 70 60 50 40 30 f=1kHz f=10kHz f=100kHz 20 10 0 2.9 3.0 3.1 3.2 Input Voltage VIN[V] 2.8V(VR1) 100 60 50 40 20 3.3 IOUT=30mA 90 60 50 40 30 f=1kHz f=10kHz f=100kHz 20 10 3.0 3.1 3.2 Input Voltage VIN[V] 2.8V(VR1) 80 70 60 50 40 30 10 0 2.9 3.3 3.0 90 Ripple Rejection RR[dB] 90 80 70 60 50 40 f=1kHz f=10kHz f=100kHz 20 10 3.1 3.2 Input Voltage VIN[V] 3.2 2.8V(VR2) IOUT=50mA 30 3.1 3.3 Input Voltage VIN[V] 100 3.0 f=1kHz f=10kHz f=100kHz 20 100 Ripple Rejection RR[dB] 3.1 3.2 Input Voltage VIN[V] 100 70 Rev. 1.10 3.0 2.8V(VR2) IOUT=30mA 80 0 2.9 f=1kHz f=10kHz f=100kHz 30 0 2.9 3.3 Ripple Rejection RR[dB] Ripple Rejection RR[dB] 70 10 90 0 2.9 IOUT=1mA 100 90 Ripple Rejection RR[dB] Ripple Rejection RR[dB] 100 2.8V(VR2) IOUT=1mA 80 70 60 50 40 30 f=1kHz f=10kHz f=100kHz 20 10 0 2.9 3.3 - 14 - IOUT=50mA 3.0 3.1 3.2 Input Voltage VIN[V] 3.3 2.85 6 2.84 5 2.83 4 VIN 2.82 3 2.81 2 2.80 1 VOUT 2.79 0 10 20 30 40 50 60 Time T[us] 70 80 0 100 90 R5323N001X(2.8V,VR1) Topt=25C COUT= Ceramic 2.2F Output Voltage VOUT[V] 2.85 2.84 5 2.83 4 VIN 2.82 3 2.81 2 2.80 1 VOUT 2.79 0 10 20 30 40 50 60 Time T[us] 70 80 90 0 100 R5323N001X(2.8V,VR1) Topt=25C 2.85 COUT= Ceramic 4.4F 2.84 6 5 2.83 Input Voltage VIN[V] Output Voltage VOUT[V] 6 Input Voltage VIN[V] Output Voltage VOUT[V] R5323N001X(2.8V,VR1) 4 VIN 2.82 3 2.81 2 2.80 1 VOUT 2.79 0 Rev. 1.10 10 20 30 40 50 60 Time T[us] - 15 - Input Voltage VIN[V] IOUT=30mA, tr=tf=5s COUT= Ceramic 1.0F 10) Input Transient Response 70 80 90 0 100 R5323N001X(2.8V,VR2) Topt=25C COUT= Ceramic 1.0F 2.84 6 5 VIN 2.83 Input Voltage VIN[V] Output Voltage VOUT[V] 2.85 4 2.82 3 2.81 2 VOUT 2.80 1 2.79 0 100 0 10 20 30 40 50 60 70 80 90 Time T[us] R5323N001X(2.8V,VR2) Topt=25C COUT= Ceramic 2.2F 6 Output Voltage VOUT[V] 2.85 5 2.83 4 Input Voltage VIN[V] 2.84 VIN 2.82 2.81 3 2 VOUT 2.80 1 2.79 0 100 10 20 30 40 50 60 Time T[us] 70 80 90 R5323N001X(2.8V,VR2) Output VoltageVOUT[V] 2.85 Topt=25C COUT= Ceramic 4.4F 2.84 6 5 VIN 2.83 4 2.82 3 2.81 2 VOUT 2.80 1 2.79 0 Rev. 1.10 10 20 30 40 50 60 Time T[us] - 16 - 70 80 90 0 100 Input VoltageVIN[V] 0 11) Load Transient Response Cin=Ceramic1.0uF 100 IOUT1 50 2.85 Output Current IOUT1 [mA] 150 100 50 2.85 2.80 VOUT1 2.75 2.85 VOUT2 2.80 VOUT1 IOUT2=30mA 0 2.80 IOUT1=30mA 2.75 VOUT2 2.85 5 10 15 2.75 20 0 Time t [us] 1.5V(VR1) 15 20 1.5V(VR2) 100 10 10 ESR [Ohm] ESR [Ohm] 10 Topt=25C CIN = COUT =Ceramic 1.0F, VIN=2.5V, f=10Hz to 2MHz (BW=30Hz) 100 1 1 0.1 0.1 0.01 0.01 50 100 Output Current IOUT [mA] 5 Time t[us] 12) ESR vs. Output Current Rev. 1.10 0 2.80 2.75 0 150 IOUT2 Output Voltage VOUT[V] Output Voltage VOUT[V] 2.8V(VR2) Cout=Ceramic1.0uF Output Current IOUT2 [mA] 2.8V(VR1) Cin=Ceramic1.0uF Cout=Ceramic1.0uF 0 150 - 17 - 50 100 Output Current IOUT [mA] 150 CIN = COUT =Ceramic 1.0F, VIN=2.5V, f=10Hz to 2MHz (BW=30Hz) 2.8V(VR1) 2.8V(VR2) 10 ESR [Ohm] 10 ESR [Ohm] 100 100 1 1 0.1 0.1 0.01 0.01 0 50 100 Output Current IOUT [mA] 0 150 50 100 Output Current IOUT [mA] 13) Minimum Operating Voltage 1.5V Minimum Operating Voltage Range 2.3 2.2 2.1 VDD(V) 2 VDD 1.9 1.8 1.7 1.6 1.5 0 75 150 Output Current IOUT(mA) Rev. 1.10 - 18 - 150 TECHNICAL NOTES When using these ICs, consider the following points: In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be sure to use a 1.0F or more capacitance COUT with good frequency characteristics and ESR (Equivalent Series Resistance) of which is in the range described as follows: The relations between IOUT (Output Current) and ESR of Output Capacitor are shown in the typical characteristics above. The conditions when the white noise level is under 40V (Avg.) are marked as the hatched area in the graph. Test these ICs with as same external components as ones to be used on the PCB. z z z Make VDD and GND line sufficient. When the impedance of these is high, the noise might be picked up or not work correctly. Connect the capacitor with a capacitance of 1F or more between VDD and GND as close as possible. Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest. Rev. 1.10 - 19 -