XC6413

XC6413 Series High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function July 15, 2003 Ver. 1 ! Low Power Consumption ! Dropout Voltage ! Maximum Output Current ! Highly Accurate ! VR Setting Output Voltage Range ! Detect Voltage Setting Range ! Low ESR capacitor compatible : 35µA (TYP.) : 60mV @ 30mA : 200mV @ 100mA : more than 300mA (380mA limit) (1.8V≤VROUT≤5.3V) : ± 2% : 0.9V ~ 5.5V : 0.9V ~ 6.0V (VIN : ≥2.0V) " APPLICATIONS # # # # # # # Mobile phones, Cordless phones Wireless communication equipment Cameras, Video recorders Portable games Portable AV equipment Reference voltage Battery powered equipment " GENERAL DESCRIPTION The XC6413 series are highly precise, low noise, positive voltage LDO regulators with voltage detector manufactured using CMOS processes. More the series achieves high ripple rejection and low dropout and consists of a voltage reference, an error amplifier, a current limiter and a phase compensation circuit plus a driver transistor. Detect voltage is selectable in 0.1V increments within a range of 0.9V ~ 6.0V and VR output voltage is selectable within a range of 0.9V~5.5V. The series is also compatible with low ESR ceramic capacitors which give added output stability. This stability can be maintained even during load fluctuations due to the excellent transient response of the series. The current limiter's foldback circuit also operates as a short protect for the output current limiter and the output pin. The series provides options to choose suited functions to each systems such as detector monitoring, detector output logic, CE and EN pin input logic, internal pull-up / down resistance, power ready (PR) function. The IC's internal regulator circuitry can be in stand-by mode by the EN function with the XC6413 A to C series. The whole IC's circuitry can be in stand-by mode via CE function with the XC6413D series (semi-custom). In the stand by mode, power consumption can be greatly reduced. XC6413 A and B series has toggle operation function. The regulator output can be OFF when XC6413B series detect voltage (semi-custom). XC6413E series can monitor the other power source by using VSEN pin (semi-custom). By the function to delay capacitor, XC6413F series can delay VD output. Delay time can be regulated by a capacitor (semi-custom). Options setup of detector monitoring, detector output logic, CE/EN pin input logic, internal pull-up and pull-down resistance etc. are possible. The function such as Power Ready (PR) function which suited systems, can be chosen (semi-custom). " FEATURES Maximum Output Current : more than 300mA (380mA limit) (1.8V≤VROUT≤5.3V) Dropout Voltage Maximum Operating Voltage VR Setting Output Voltage Range VD Detect Voltage Setting Range When monitoring VIN VR setting voltage accuracy VD detect voltage accuracy VR.VD Temperature Coefficient Low Power Consumption High Ripple Rejection Low Output Noise Low ESR Capacitor Compatible Ultra Small Packages : 200mV (IROUT=100mA) : 2.0V ~ 10.0V : 0.9V~ 5.5V (0.1V step) : 0.9V ~ 6.0V (0.1V step) : more than 2.0V : ± 2% : ± 2% : ±100ppm/OC (TYP.) : TYP. 35µA : 65dB (10kHz) : 30mVrms : Ceramic capacitor : SOT-25 (SOT-23-5) : USP-6B : SOT-89-5 Operational Ambient Temperature: : - 40 ~ 85OC " TYPICAL APPLICATIONS 1 CI 1µ VIN VSS VROUT 5 Rpull 220K CL 1µF 1 CIN 1µF VIN VSS VSEN VROUT 5 Rpull 220K VDOUT 4 CL 1µF CIN 1µF 1 2 3 VI VROUT 5 Rpull 220K CL 1µF 2 3 2 3 VSS Cd EN/CE VDOUT 4 VDOUT 4 Cd 0.01µF XC6413A ~ D Series XC6413E Series XC6413F Series Semiconductor Ltd. 1 XC6413 Series " PIN CONFIGURATION VROUT 5 High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function VDOUT 4 EN/CE VSEN/Cd 5 VDOUT 4 EN/CE VSEN/Cd NC VIN 1 2 3 6 5 4 VDOUT VSS VROUT 1 2 3 VIN VSS EN/CE VSEN/Cd 1 VIN 2 VSS 3 VROUT SOT-25 (TOP VIEW) SOT-89-5 (TOP VIEW) USP-6B (TOP VIEW) " PIN ASSIGNMENT PIN NUMBER SOT-25 1 2 3 3 3 3 4 3 SOT-89-5 1 2 5 5 5 5 4 3 USP-6B 3 5 1 1 1 1 6 4 2 PIN NAME VIN VSS EN CE VSEN Cd VDOUT VROUT NC FUNCTION Power Input Ground VR On / Off Control On / Off Control VD Monitoring Delay capacitor Connection VD Output VR Output No connection " SELECTION GUIDE 1. Toggle Function, VD self-saturation as option SERIES XC6413A XC6413B XC6413C ~ F TOGGLE FUNCTION (BUILT-IN) VD with Toggle Function VD with Toggle Function and Self-Saturation VD without Toggle Function 2. Stand-by mode function as option SERIES XC6413A ~ C XC6413D XC6413E, F STAND-BY MODE FUNCTION VR with Stand-by mode function Chip Stand-by mode function No Stand-by mode function 3. CE / EN Input Logic, Internal Pull-up / down as option SERIES XC6413 * A ~ D XC6413 * E ~ K XC6413 * L ~ P XC6413 * R ~ U CE INPUT LOGIC High Active with pull down High Active with no pull down Low Active with pull up Low Active with no pull up * : A ~ D series 4. VD Sense as option SERIES XC6413 * A, B, E, F, L, M, R, S, V, X XC6413 * C, D, H, K, N, P, T, U, Y, Z XC6413 E V ~ Z VD SENSE PIN VIN VOUT VSEN * : A ~ D and F series 5. VD Output Logic as option SERIES XC6413A ~ F VD OUTPUT LOGIC FUNCTION Detect L or Detect H 6. VD Delay Function as option SERIES XC6403A ~ E XC6403F DELAY FUNCTION No Delay Delay time adjustable by connecting Cd Semiconductor Ltd. 2 XC6413 Series " ORDERING INFORMATION XC6413 123456 PIN NUMBER FUNCTION Denotes Optional Functions : A : Toggle and EN Function (preliminary) B : Toggle, EN Function, VD signal/VR OFF function (preliminary) C : EN Function (preliminary) D : CE Function (preliminary) E : VSEN Pin (preliminary) F : Cd Pin High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function PIN NUMBER FUNCTION Denotes Packaging Types: 1 5 D : USP-6B M : SOT-23 P : SOT-89-5 2 Denotes Types : As in the chart below. Sequence Number according to R&D standard in regards to output voltage and detect voltage Denotes Taping Direction: 6 R: Standard feed L : Reverse feed 34 VR Setting Output Voltage Range : 0.9V ~ 5.5V Detect Voltage Setting Range : 0.9V ~ 6.0V 0.1V step increments is available PIN NUMBER : 2 Types 2 A B C D E F H K L M N P R S T U V X Y Z EN / CE FUNCTION Function Function Function Function Function Function Function Function Function Function Function Function Function Function Function Function Nonfunctional Nonfunctional Nonfunctional Nonfunctional EN / CE LOGIC High Active High Active High Active High Active High Active High Active High Active High Active Low Active Low Active Low Active Low Active Low Active Low Active Low Active Low Active - PULL UP/DOWN RESISTANCE Function Function Function Function Nonfunctional Nonfunctional Nonfunctional Nonfunctional Function Function Function Function Nonfunctional Nonfunctional Nonfunctional Nonfunctional - VD SENSE PIN VIN VIN VROUT VROUT VIN VIN VROUT VROUT VIN VIN VROUT VROUT VIN VIN VROUT VROUT VIN / VSEN VIN / VSEN VROUT VROUT VD OUTPUT LOGIC Detect L Detect H Detect L Detect H Detect L Detect H Detect L Detect H Detect L Detect H Detect L Detect H Detect L Detect H Detect L Detect H Detect L Detect H Detect L Detect H PIN NUMBER 1 A ~ D Series E & F Series F Series * XC6413A, B, C, D, E Series are are under development. For further detail, please ask your sales contacts. Semiconductor Ltd. 3 XC6413 Series " ODERING INFORMATION (CONTINUED) PIN NUMBER High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function 3, 4 Type (80 ~ 99 : Standard voltage products) 34 01 02 03 04 05 06 07 08 09 10 VROUT VDOUT 34 11 12 13 14 15 16 17 18 19 20 VROUT VDOUT 34 80 81 82 83 84 85 86 87 88 89 VROUT 1.8 2.8 1.8 2.5 2.85 3.0 3.5 3.0 3.3 VDOUT 1.6 3.1 2.0 2.8 3.2 3.3 3.8 4.2 4.0 34 90 91 92 93 94 95 96 97 98 99 VROUT VDOUT Except for the standard products, minimum ordering quantity is 15K. " ABSOLUTE MAXIMUM RATINGS PARAMETER VIN PIN Voltage VROUT Current VROUT Pin Voltage VDOUT Current VD Pin Voltage VCE / VSEN / Cd Pin Voltage Continuous Total Power Dissipation SOT-25 SOT-89-5 USP-6B Operating Ambient Temperature Storage Temperature Topr Tstg Pd SYMBOL VIN VRIOUT VROUT VDIOUT VDOUT VCE / VSEN / Cd 250 500 100 - 40 ~ + 85 - 55 ~ + 125 O O RATINGS 12 700 VSS -0.3 ~ VIN +0.3 50 VSS -0.3 ~ 12.0 VSS -0.3 ~ VIN + 0.3 UNITS V mA V mA V V mW C C " PACKAGING INFORMATION $ SOT-25 (SOT-23-5) $ SOT-89-5 $ USP-6B 2.0 + 0.15 (0.45) 0.5+0.1 (0.05) φ (0.27) 0.005+0.002 (0.27) 1 0.45) 1 2 3 6 5 4 1.8+0.15 (0.27) 45 O ( (0.45) (0.45) (0.125) 45 O 45 O 45 A A’ O (0.65)+0.15 -0.05 1 0.7+0.03 5-0.2+0.05 3 2 4 5 00.1+0.03 0.2+0.05 1 6 1 1 1 1.0+0.1 0.25+0.1 . 0.25+0.1 1 Semiconductor Ltd. 4 0.5+0.1 0.5+0.1 1.6+0.15 (0.05) -0.005 +0.01 AAA AAA XC6413 Series " ELECTRICAL CHARACTERISTICS XC6413 FV / FX / FY / FZ Series PARAMETER VR Output Voltage VR Maximum Output Current (0.9 ~ 1.7V product) VR Maximum Output Current (1.8 ~ 5.3V product) VR Load Regulation VR Dropout Voltage VOLTAGE REGULATOR Supply Current (FV / FX / FY / FZ Series) VR Line Regulation Input Voltage VR Output Voltage Temperature Characteristics SYMBOL VROUT(E) IROUTMAX IROUTMAX ∆VROUT Vdif1 Vdif2 IDD ∆VROUT ∆VIN ⋅ VROUT VIN ∆VROUT ∆Topr ⋅ VROUT PSRR CONDITIONS IROUT=30mA VIN = 3.1V VIN=3.1V @ VROUT ≤ 2.1V 1mA≤IROUT≤100mA IROUT=30mA IROUT=100mA VIN=VROUT(T)+1.0V High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function Ta=25OC MIN x 0.98 150 300 15 E-1 E-2 35 0.01 2.0 IROUT=30mA -40OC≤Topr≤85OC VIN=[VROUT(T)+1.0]V+0.5Vp-pAC When VROUT(T) ≤ 1.25V ! VIN=2.25V+0.5Vp-pAC IROUT=50mA, f=10kHz VIN=3.1V @ VROUT ≤ 2.1V VIN=3.1V VIN=VROUT(T)+1.0V VIN=3.1V @ VROUT ≤ 2.1V x 0.98 VDF (T) x 0.02 VDOUT = 0.5V VIN = 2.0V VIN = 3.0V VIN = 4.0V VIN = 5.0V VIN = 6.0V VIN = 7.0V VIN = 8.0V VIN = 9.0V VIN = 10.0V -40OC≤Topr≤85OC VIN=7.0V, Cd=0V Delay Resistance=7.0V/Delay Current 1.0 2.0 4.0 5.0 6.0 6.5 7.0 7.5 8.0 8.5 300 ±100 50 TYP VROUT(T) MAX x 1.02 UNITS V mA mA mV mV mV µA %/V V ppm / C O CIRCUIT 1 1 1 1 1 1 2 1 1 3 70 0.20 10.0 VROUT(T)+1.0V≤VIN≤10.0V IROUT=30mA VR Ripple Rejection Rate 65 dB VR Current Limiter (1.8V or more) VR Current Limiter (1.7V or less) Short-circuit Current VD Detect Voltage VD Hysterisis Range IRlim IRlim IRshort VDF (E) VHYS 380 380 50 VDF (T) VDF (T) x 0.05 5.0 7.5 9.5 10.5 11.5 12.5 13.5 14.5 14.5 ±100 2.0 3.5 x 1.02 VDF (T) x 0.08 mA mA 1 1 1 4 4 mA V V VOLTAGE DETECTOR VD Output Current IDOUT mA 5 VD Detect Voltage Temperature Characteristics Delay Resistance ∆VDF / ∆Topr ⋅ VDF Delay ppm / OC MΩ 4 6 NOTE: (NOTE 1) Unless otherwise stated, VIN=VOUT(T)+1.0V (NOTE 2) VROUT(T)=Specified VR Output Voltage (NOTE 3) VOUT(E)=Actual VR Output Voltage (I.e. the VR output voltage when "VROUT(T)+1.0V" is provided at the VIN pin while maintaining a certain IROUT value). (NOTE 4) Vdif={VIN1(NOTE6)-VROUT1(NOTE5)} (NOTE 5) A voltage equal to 98% of the VR Output Voltage whenever an amply stabilized VROUT1=IROUT{VROUT(T)+1.0V} is input. (NOTE 6) VIN1=The Input Voltage when VOUT1 appears as Input Voltage is gradually decreased. (NOTE 7) VDF (T) : Specified Detect Voltage value (NOTE 8) VDF (E) : Actual Detect Voltage value. Refer E-0 chart for VDF(T) less than 1.5V. (NOTE 9) VD output current = sink current value when detecting. Semiconductor Ltd. 5 XC6413 Series " VR DROPOUT VOLTAGE SYMBOL PARAMETER SPECIFIED DETECT VOLTAGE OUTPUT VOLTAGE High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function E-0 OUTPUT VOLTAGE DETECT VOLTAGE (V) VROUT / VDF MIN. 0.870 0.970 1.070 1.170 1.270 1.370 1.470 1.568 1.666 1.764 1.862 1.960 2.058 2.156 2.254 2.352 2.450 2.548 2.646 2.744 2.842 2.940 3.038 3.136 3.234 3.332 3.430 3.528 3.626 3.724 3.822 3.920 4.018 4.116 4.214 4.312 4.410 4.508 4.606 4.704 4.802 4.900 4.998 5.096 5.194 5.292 5.390 5.488 5.586 5.684 5.782 5.880 MAX. 0.930 1.030 1.130 1.230 1.330 1.430 1.530 1.632 1.732 1.836 1.938 2.040 2.142 2.244 2.346 2.448 2.550 2.652 2.754 2.856 2.958 3.060 3.162 3.264 3.366 3.468 3.570 3.672 3.774 3.876 3.978 4.080 4.182 4.284 4.386 4.488 4.590 4.692 4.794 4.896 4.998 5.100 5.202 5.304 5.406 5.508 5.610 5.712 5.814 5.916 6.018 6.120 Vdif1 TYP. 1050 1000 900 800 700 600 500 400 300 200 120 80 80 80 80 80 70 70 70 70 70 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 50 50 50 50 50 50 E-1 DROPOUT VOLTAGE 1 (mV) (IOUT=30mA) Ta=25OC Vdif1 MAX. 110 110 100 900 800 700 600 500 400 300 150 120 120 120 120 120 100 100 100 100 100 90 90 90 90 90 90 90 90 90 90 80 80 80 80 80 80 80 80 80 80 70 70 70 70 70 70 Vdif2 TYP. 1150 1050 950 850 750 650 550 500 400 300 280 240 240 240 240 240 220 220 220 220 220 200 200 200 200 200 200 200 200 200 200 180 180 180 180 180 180 180 180 180 180 160 160 160 160 160 160 E-1 DROPOUT VOLTAGE 2 (mV) (IOUT=100mA) Ta=25OC Vdif2 MAX. 1200 1200 1100 1000 900 800 700 600 500 400 380 350 330 330 310 310 290 290 290 270 270 270 250 250 250 250 250 250 250 250 250 230 230 230 230 230 230 230 230 230 230 210 210 210 210 210 210 VROUT(T) VDF(T) 0.90 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 3.50 3.60 3.70 3.80 3.90 4.00 4.10 4.20 4.30 4.40 4.50 4.60 4.70 4.80 4.90 5.00 5.10 5.20 5.30 5.40 5.50 5.60 5.70 5.80 5.90 6.00 Semiconductor Ltd. 6 XC6413 Series " TEST CIRCUITS $ Circuit 1 XC6413F Series High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function VIN A VROUT CL= * *µF (Ceramic) A CIN= 1µF (Ceramic) VSS VDOUT Cd V VIN RL $ Circuit 2 XC6413F Series VIN A CIN= 1µF (Ceramic) VROUT VSS VDOUT Cd VIN $ Circuit 3 XC6413F Series VROUT ≤ 1.25V VIN={2.25V}VDC +0.5Vp-pAC VIN={VROUT+1.0V}VDC +0.5Vp-pAC VIN VROUT VSS CL= * *µF (Ceramic) V VDOUT Cd V IROUT=50mA Output Capacitor Corresponding Chart VROUT CL 0.9 ~1.2V more than 4.7µF 1.3 ~ 1.7V more than 2.2µF Semiconductor Ltd. 7 XC6413 Series " TEST CIRCUITS (CONTINUED) $ Circuit 4 XC6413F Series [VD Sense, VIN type] High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function VIN CIN= 1µF (Ceramic) VIN Cd VROUT VSS VDOUT A VDS XC6413F Series [VD Sense, VROUT type] VIN CIN= 1µF (Ceramic) VIN Cd VROUT VSS VDOUT A VDS $ Circuit 5 XC6413F Series [VD Sense, VIN type] VIN CIN= 1µF (Ceramic) VIN Cd VROUT VSS VDOUT A VDS XC6413F Series [VD Sense, VROUT type] VIN CIN= 1µF (Ceramic) VIN Cd VROUT VSS VDOUT A VDS Semiconductor Ltd. 8 XC6413 Series " TEST CIRCUITS (CONTINUED) $ Circuit 6 XC6403F Series [VD Sense, VIN type] High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function VIN CIN= 1µF (Ceramic) VIN VROUT VSS VDOUT A Cd XC6403F Series [VD Sense, VROUT type] VIN CIN= 1µF (Ceramic) VIN VROUT VSS VDOUT A Cd Semiconductor Ltd. 9 XC6413 Series " BLOCK DIAGRAM High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function Optional: Active H with Pull-down R Active H with no Pull-down R Active L with Pull-up R Active L with no Pull-up R toggle FF VIN Optional: VR circuit Current Limit EN ON / OFF Control T R Q VIN SENSE VROUT SENSE 1 Shot Pulse Power ON Clear for FF VROUT R2 R1 Error Amp. CFB Voltage Reference Optional (B Series) VDOUT Optional: Detect H Detect L Comp. VD R4 R3 VSS XC6413A, B Series VI EN / CE Optional: Active H with Pull-up R Active H with no Pull-up R Active L with Pull-up R Active L with no Pull-up R ON / OFF Control VR circuit (C Series) each circuit (D Series) Current Limit Optional: VIN SENSE VROUT SENSE Error Amp. CFB Voltage Reference VROUT R2 R1 VDOUT Optional: Detect H Detect L Comp. VD R4 R3 VSS XC6413C, D Series Semiconductor Ltd. 10 XC6413 Series " BLOCK DIAGRAM (CONTINUED) High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function VIN VSEN Current Limit Error Amp. CFB Voltage Reference VROUT R2 R1 VDOUT Optional: Detect H Detect L Comp. VD R4 R3 VSS XC6413E Series VIN Optional: Current Limit VIN SENSE VROUT SENSE Rdelay Error Amp. VROUT CFB R2 R1 Cdelay Voltage Reference VDOUT Optional: Detect H Detect L Comp. VD R4 R3 VSS XC6413F Series Semiconductor Ltd. 11 XC6413 Series High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function The voltage divided by resistors R1 & R2 which are connected to VROUT pin is compared with the internal reference voltage by the error amplifier. The P-Channel MOSFET, which is connected to the VOUT pin, is then driven by the subsequent output signal. The output voltage at the VROUT pin is controlled & stabilized by a system of negative feedback. The current limit circuit and short protect circuit operate in relation to the level of output current. Further, the voltage regulator's internal circuitry can be shutdown via the CE pin's signal. The voltage divided by resistors R3 & R4 which are connected to VROUT pin, VIN or VSEN pin are compared with the internal reference voltage by the compalator. Option is available for the VDSEN. A 'High' or 'Low' signal level can be output from the VDOUT pin when the VD pin voltage level of less than the detect voltage is reached. Option is available for the VD output logic. As VDOUT is an open-drain N-channel output, a pull-up resistor of about 220KΩ is needed to achieve a voltage output. Because of hysterisis at the detector function, output at the VDOUT pin will invert when the detect voltage level increase more than the release voltage (105% of the detect voltage). Even when the XC6413A, B, C, series are in stand-by mode, the voltage detector function operates and the output voltage at VDOUT will output according to the voltage level at VDSENSE voltage. In stand-by, if a voltage of the recovery voltage is present at the VROUT pin (from another power source), the VDOUT pin will be high impedance and pull up voltage will be output at VDOUT. By connecting Cdelay pin to a capacitor (Cd), XC6413F series can put delay time to VDOUT voltage when releasing voltage. Delay time can be set by the internal resistance (2M Ω fixed) and the value of Cd as the following equation. Delay Time = Cdelay x Rdelay x 0.7 With the regulator of XC6413 series, a stable output voltage is achievable even if used with low ESR capacitors as a phase compensation circuit is builtin. In order to ensure the effectiveness of the phase compensation, we suggest that an output capacitor (CL) is connected as close as possible to the output pin (VROUT) and the VSS pin. Please use an output capacitor (CL) with a capacitance refering to the chart below, and an 1 µF of input capacitor (CIN) be connected between VIN and VSS to stabilize input power source. VROUT CL 0.9 ~ 1.2V more than 4.7µF 1.3 ~ 1.7V more than 2.2µF The regulator of XC6413 series offers a combination of current limit and circuit protection by means of a built-in fixed current limiter circuit & a foldback circuit. When the load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops. As a result of this drop in output voltage, the foldback circuit operates, output voltage drops further and output current decreases. When the output pin is shorted, a current of about 50mA flows. The IC's internal regulator circuitry can be shutdown via the signal from the EN pin with the XC6413A, B, C series. In shutdown mode, output at the VROUT pin will be pulled down to the VSS level via R1 & R2. The whole IC's circuitry can be shut down via CE pin with the XC6413D series and power consumption can be reduced to around 0 µA. In shutdown mode, output of VD is voltage after detecting. When choosing Detect L, input current can be set by the following formula. Input Current = VIN voltage / Pull Up Resistance In standby mode, the above input current can be withheld by connecting pull-up resistance between VROUT and VDOUT. Note that as the XC6413*E to K of XC6413A to D series are 'High Active/No Pull Down' and XC6413*R to U of XC6413A to D series are 'Low Active/No Pull UP', operations will become unstable with the CE pin open (See the chart below). SERIES XC6413 * A ~ D XC6413 * E ~ K XC6413 * L ~ P XC6413 * R ~ U EN/CE INPUT LOGIC High Active with pull down High Active with no pull down Low Active with pull up Low Active with no pull up We suggest that you use this IC with either a VIN voltage or a VSS voltage input at the EN or CE pin. If this IC is used with the correct specifications for the EN or CE pin, the IC will operate normally. However, supply current may increase as a result of through current in the IC's internal circuitry if a voltage other than VIN or VSS is applied. Semiconductor Ltd. 12 XC6413 Series High Speed LDO Regulators Low ESR Cap. Compatible, Voltage Detector Function XC6413 series has built-in toggle ON/OFF switch which repeats an on/off operation via the EN pin's leading edge signal when the EN logic is "High" active, and via the EN pin's falling edge signal when the EN logic is "Low" active (Please also refer the figure below). Please input EN input signal more than 500nsec. If the EN input signal is less than 500nsec, there is the case that the circuit falls to respond and the toggle function cease to work. To operate the toggle function properly, please eliminate the noise from EN signal by using RC filter, etc. A flip-flop FF used for toggle operation can be reset within the XC6413B series directly by the signal from the voltage detector. The signal of the voltage detector will be transformed to one-shot signal to reset FF. The voltage regulator output when the EN pin release the signal again. CIN 1µF 1.5kΩ VIN VIN VROUT VSS EN Rpull 220kΩ VDOUT CL 1µF 0.1µF Internal Circuit - Response time approx.10µsec VROUT GND VROUT VIN GND EN pin signal more than 500nsec EN Logic "High" Active " NOTES ON USE 1. Please use this IC within the stated absolute maximum ratings. The IC is liable to malfunction should the ratings be exceeded. 2. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current. Please strengthen VIN and VSS wiring in particular. 3. Please wire the input capacitor (CIN) and the output capacitor (CL) as close to the IC as possible. In case that rapid input fluctuation or load fluctuation are occurred, please enlarge capacitor value such as CIN or CL to stabilize the operation. Semiconductor Ltd. 13