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XC6601 Series
ETR0335_002
Low Voltage Input LDO Voltage Regulators
Preliminary
GENERAL DESCRIPTION
The XC6601 series is a CMOS LDO voltage regulator with precise ( 20mV) outputs which enables the operation in ultra low On resistance even where low output voltages to achieve high efficiency of the output current. The series is suited for the application which requires low dropout voltage operation. The series consists of a voltage reference, an error amplifier, a driver transistor, a current limiter, a fold back circuit, a thermal shutdown (TSD) circuit, a Under Voltage Lock Out (U.V.L.O.) and a phase compensation circuit. The output voltage is selectable in 50mV increments within the range of 0.7V to 1.8V using laser trimming technologies. The output stabilization capacitor (CL) is also compatible with low ESR ceramic capacitors. The over current protection circuit (the current limiter and the fold back circuit) and the thermal shutdown circuit (the TSD circuit) are built-in. These two protection circuits will operate when the output current reaches limit level or the junction temperature reaches temperature limit level. With the built-in U.V.L.O. function, the regulator output is forced OFF when the VBIAS pin or the VIN pin becomes the U.V.L.O. voltage or lower. The CE function enables the output to be turned off and the series becomes a stand-by mode resulting in greatly reduced power consumption. At the time of entering the stand-by mode, the series enables the electric charge at the output capacitor (CL) to be discharged via the internal auto-discharge switch placed between the VOUT pin and the VSS pin, as a result the VOUT pin quickly returns to the VSS level.
APPLICATIONS
Mobile phones Cordless phones Wireless communication equipment Portable games Cameras Audio visual equipment Portable AV equipment PDAs
FEATURES
Maximum Output Current Dropout Voltage Bias Voltage Range Input Voltage Range Output Voltage Range Output Voltage Accuracy Power Consumption U.V.L.O. TSD (Detect/Release) Operating Temperature Range CL High Speed Auto-Discharge Low ESR Capacitor Packages : 400mA (Limiter 500mA TYP.) : 35mV@IOUT=100mA (TYP.) (at VBIAS - VOUT(E)=2.4V) : 2.5V ~ 6.0V
(VBIAS - VOUT(E) 0.9V)
: 1.0V ~ 3.0V (VIN VBIAS) : 0.7V ~ 1.8V (50mV increments) : 20mV : IBIAS=25 A , IIN=1.0 A (TYP.) : IBIAS=0.01 A , IIN=0.01 A (TYP.) : VBIAS=2.0V, VIN=0.4V (TYP.) :150 /125 (TYP.) : -40 ~ 85 : Ceramic Capacitor Compatible : USP-6C, SOT-25, SOT-89-5
TYPICAL APPLICATION CIRCUIT
VBIAS =3.6V , VIN =1.5V , VOUT =1.2V
TYPICAL PEFORMANCE CHARACTERISTICS
Dropout Voltage vs. Output Current
1/11
XC6601 Series
PIN CONFIGURATIOIN
USP-6C SOT-25
VOUT 5 CE 4
SOT-89-5
1 VIN
*The heat dissipation pad of the USP-6C
2 VBIAS SOT-25 (TOP VIEW)
3 VSS
package is recommended to solder as the recommended mount pattern and metal mask pattern for mounting strength. The mount pattern should be electrically opened or connected to the VBIAS (No.1) pin.
PIN ASSIGNMENT
PIN NUMBER USP-6C 1 3 4 2 6 SOT-25 2 1 5 3 4 SOT-89-5 2 4 5 3 1 PIN NAME VBIAS VIN VOUT VSS CE FUNCTION Power Supply Input Driver Transistor Input Output Ground ON/OFF Control
PRODUCT CLASSIFICATION
Ordering Information XC6601
MARK DESCRIPTION Type of Regulators Output Voltage Output Voltage Accuracy SYMBOL A B 07 ~ 18 1 B M Packages E P R L DESCRIPTION : CE High Active, Pull-Down Resistor Built-in, CL Auto Discharge Function : CE High Active, No Pull-Down Resistor Built-in, CL Auto Discharge Function : e.g.) VOUT(T)=1.2V=1,=2 : 100mV increments, 20mV accuracy e.g.) 1.2V=1,=2,=1 : 50mV increments, 20mV accuracy e.g.) 1.25V=1,=2,=B : SOT-25 : USP-6C : SOT-89-5 : Embossed Tape (Standard Feed) : Embossed Tape (Reverse Feed)
Device Orientation
2/11
XC6601
Series
BLOCK DIAGRAMS
(1) XC6601A Series
(2) XC6601B Series
*Diodes inside the circuit are an ESD protection diode and a parasitic diode.
3/11
XC6601 Series
MAXIMUM ABSOLUTE RATINGS
Ta=25
PARAMETER Bias Voltage Input Voltage Output Current Output Voltage CE Input Voltage USP-6C Power Dissipation SOT-25 SOT-89-5 Operating Temperature Range Storage Temperature Range (*1) IOUT=Less than Pd / (VIN-VOUT) SYMBOL VBIAS VIN IOUT VOUT VCE Pd Topr Tstg RATINGS VSS-0.3 ~ +7.0 VSS-0.3 ~ +7.0 700 (*1) VSS-0.3 ~ VBIAS+0.3 VSS-0.3 ~ VIN+0.3 VSS-0.3 ~ +7.0 120 250 500 -40 ~ +85 -55 ~ +125 UNITS V V mA V V mW
ELECTRICAL CHARACTERISTICS
PARAMETER Bias Voltage
(*1)
Ta=25
MIN. 2.5 1.0 -0.02 TYP. MAX. 6.0 3.0 UNITS CIRCUIT V V V mA mV mV A A
SYMBOL VBIAS VIN VOUT(E) (*3) IOUTMAX VOUT
CONDITIONS VCE =VBIAS,VIN =VOUT(T)+0.3V VBIAS=VCE=3.6V VBIAS=VCE=3.6V, VIN =VOUT(T)+0.3V, IOUT=1mA VBIAS=VCE=3.6V, VIN =VOUT(T)+0.3V
Input Voltage (*2) Output Voltage Maximum Output Current Load Regulation Dropout Voltage Supply Current 1 Supply Current 2
VOUT(T) (*4) +0.02
E-0
(*5)
400 -
10
E-1
(*6)
-
Bias Current (*10)
Stand-by Current 1 Stand-by Current 2 Bias Regulation
Input Regulation
Bias Voltage U.V.L.O. Input Voltage U.V.L.O. VBIAS Ripple Rejection VIN Ripple Rejection
VBIAS=VCE=3.6V, VIN=VOUT(T)+0.3V, 1mA IOUT 100mA (*7) Vdif VBIAS=VCE, IOUT=100mA VBIAS=VCE=3.6V, VIN=VOUT(T)+0.3V IBIAS VOUT=OPEN VBIAS=VCE=3.6V, VIN=VOUT(T)+0.3V IIN VOUT=OPEN VOUT(T) 0.95V, VBIAS=CE=3.6V, VIN=VOUT(T)+0.05V, VOUT=VOUT(T) - 0.05V IBIASMAX VOUT(T) 0.95V, VBIAS=CE=3.6V, VIN=1.0V VOUT= VOUT(T) - 0.05V IBIAS_STB VBIAS=6.0V, VIN=3.0V, VCE=VSS IIN_STB VBIAS=6.0V, VIN=3.0V, VCE=VSS VOUT/ 2.5V VBIAS 6.0V, VBIAS VOUT VIN=VOUT(T)+0.3V, VBIAS=VCE, IOUT=1mA VOUT(T) 0.90V, VOUT(T)+0.1V VIN 3.0V, VBIAS=VCE=3.6V, IOUT=1mA VOUT/ VIN VOUT V OUT(T) 0.90V, 1.0V VIN 3.0V VBIAS=VCE=3.6V, IOUT=1mA VCE =VBIAS, VIN =VOUT(T)+0.3V, VBIAS_UVLO IOUT=1mA VIN_UVLO VBIAS=VCE=3.6V, IOUT=1mA VBIAS=3.6VDC+0.2Vp-pAC, VBIAS_PSRR VIN=VOUT(T)+0.3V, IOUT=30mA,f=1kHz VIN=VOUT(T)+0.3VDC+0.2Vp-pAC, VIN_PSRR VBIAS=3.6V, IOUT=30mA, f=1kHz
-
25 1.0
-
2.0
-
mA
-
0.01 0.01 0.01
-
A A %/V
-
0.01
-
%/V
-
2.0 0.4 40 60
-
V V dB dB
4/11
XC6601
Series
ELECTRICAL CHARACTERISTICS (Continued)
PARAMETER Output Voltage Temperature Characteristics Limit Current Short Current Thermal Shutdown Detect Temperature Thermal Shutdown Release Temperature Hysteresis Width CL Auto-Discharge Resistance (*7) CE "H" Level Voltage CE "L" Level Voltage CE "H" Level Current (A Series) CE "H" Level Current (B Series) CE "L" Level Current SYNBOL VOUT/ Topr VOUT ILIM ISHORT TTSD TTSR TTSD TTSR Rdischg VCEH VCEL VBIAS=3.6V, VIN= VOUT(T)+0.3V, VCE= VSS, VOUT=VOUT(T) VBIAS=3.6V, VIN= VOUT(T)+0.3V VBIAS=3.6V, VIN= VOUT(T)+0.3V VBIAS=VCE=6.0V, VIN=VOUT(T)+0.3V VBIAS=6.0V, VCE=VSS VIN=VOUT(T)+0.3V 3.5 -0.1 -0.1 CONDITIONS VBIAS=VCE=3.6V, VIN=VOUT(T)+0.3V , IOUT=30mA, - 40 Topr 85 VOUT=VOUT(E) 0.95, VBIAS=VCE=3.6V, VIN=VOUT(T)+0.3V VBIAS=VCE=3.6V, VIN=VOUT(T)+0.3V, VOUT=0V Junction Temperature Junction Temperature MIN. TYP. 100 MAX. -
Ta=25
UNITS CIRCUIT ppm/
400 1.0
50 150 125 25 450 -
6.0 0.25 7.0
mA mA
V V
ICEH
A 0.1 0.1 A
ICEL
NOTE: * 1: Please use Bias voltage VBIAS within the range VBIAS -VOUT(E) 0.9V * 2: Please use Input voltage VIN within the range VIN VBIAS * 3: VOUT(E) = Effective output voltage (Refer to the voltage chart E-0 and E-1) * 4: VOUT (T) = Specified output voltage * 5: E-0 = Please refer to the table named OUTPUT VOLTAGE CHART * 6: E-1 = Please refer to the table named DROPOUT VOLTAGE CHART * 7: Vdif = {VIN1(*8)-VOUT1(*9)}. * 8: VIN1 = The input voltage when VOUT1 appears as input voltage is gradually decreased. * 9: VOUT1 = A voltage equal to 98% of the output voltage while maintaining an amply stabilized output voltage when VIN=VOUT(T) the VIN pin. * 10: IBIASMAX = A supply current at the VBIAS pin providing for the output current (IOUT) .
0.3V is input at
OUTPUT VOLTAGE CHART
SETTING OUTPUT VOLTAGE (V) VOUT(T) 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 E-0 OUTPUT VOLTAGE (V) VOUT MIN. 0.680 0.730 0.780 0.830 0.880 0.930 0.980 1.030 1.080 1.130 1.180 1.230 MAX. 0.720 0.770 0.820 0.870 0.920 0.970 1.020 1.070 1.120 1.170 1.220 1.270 SETTING OUTPUT VOLTAGE (V) VOUT(T) 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 E-0 OUTPUT VOLTAGE (V) VOUT MIN. 1.280 1.330 1.380 1.430 1.480 1.530 1.580 1.630 1.680 1.730 1.780 MAX. 1.320 1.370 1.420 1.470 1.520 1.570 1.620 1.670 1.720 1.770 1.820
5/11
XC6601 Series
DROPOUT VOLAGE CHART (Continued)
SETTING OUTPUT VOLTAGE (V) VOUT(T) 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 E-1 DROPOUT VOLTAGE (mV) Vdif VBIAS=3.3 (V) VBIAS=3.6 (V) VBIAS=4.2 (V) Vdif Vdif Vdif Vgs Vgs Vgs TYP. MAX. TYP. MAX. TYP. MAX. 2.60 2.55 2.50 2.45 2.40 2.35 2.30 2.25 2.20 2.15 2.10 2.05 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 1.55 1.50 33 34 35 36 37 38 40 42 44 47 50 54 2.90 2.85 2.80 2.75 2.70 2.65 2.60 2.55 2.50 2.45 2.40 2.35 2.30 2.25 2.20 2.15 2.10 2.05 2.00 1.95 1.90 1.85 1.80 31 31 32 33 34 35 36 37 38 40 42 44 3.50 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 2.95 2.90 2.85 2.80 2.75 2.70 2.65 2.60 2.55 2.50 2.45 2.40 28 28 29 29 30 30 31 31 32 33 34 35 -
VBIAS=3.0 (V) Vdif Vgs (*1) TYP. MAX. 2.30 2.25 2.20 2.15 2.10 2.05 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 1.55 1.50 1.45 1.40 1.35 1.30 1.25 1.20 36 37 38 40 42 44 47 50 54 58 63 75 -
VBIAS=5.0 (V) Vdif Vgs TYP. MAX. 4.30 4.25 4.20 4.15 4.10 4.05 4.00 3.95 3.90 3.85 3.80 3.75 3.70 3.65 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 26 26 26 26 27 27 27 28 28 28 29 29 -
*1): Vgs is a Gate -Source voltage of the driver transistor that is defined as the value of VBIAS - VOUT (T). A value of the dropout voltage is determined by the value of the Vgs.
6/11
XC6601
Series
OPERATIONAL EXPLANATION
The voltage divided by resistors R1 & R2 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 VOUT pin is controlled & stabilized by a system of negative feedback. VBIAS pin is power supply pin for output voltage control circuit, protection circuit and CE circuit. When output current increase, the VBIAS pin supplies output current also. VIN pin is connected to a driver transistor and provides output current. In order to obtain high efficient output current through low on-resistance, please take enough Vgs (=VBIAS - VOUT) of the driver transistor. Output current triggers operation of constant current limiter and foldback circuit, heat generation triggers operation of thermal shutdown circuit, the driver transistor circuit is forced OFF when VBIAS or VIN voltage goes lower than U.V.L.O. voltage. Further, the IC's internal circuitry can be shutdown via the CE pin's signal.
XC6601A series
With the XC6601 series, a stable output voltage is achievable even if used with low ESR capacitors, as a phase compensation circuit is built-in. The output capacitor (CL) should be connected as close to VOUT pin and VSS pin to obtain stable phase compensation. Values required for the phase compensation are as the table below. For a stable power input, please connect an bias capacitor (CBIAS ) of 1.0 F between the V BIAS pin and the VSS pin. Also, please connect an input capacitor (CIN) of 1.0 F between the VIN pin and the VSS pin. In order to ensure the stable phase compensation while avoiding run-out of values, please use the capacitor (CBIAS, CIN, CL ) which does not depend on bias or temperature too much. The table below shows recommended values of CBIAS, CIN, CL.
SETTING VOLTAGE 0.7V1.8V
BIAS CAPACITOR CBIAS CBIAS=1.0F
INPUT CAPACITOR CIN CIN=1.0F
OUTPUT CAPACITOR CL CL=4.7F
Recommended Values of CBIAS, CIN, CL
7/11
XC6601 Series
OPERATIONAL EXPLANATION (Continued)
XC6601 series can quickly discharge the electric charge at the output capacitor (CL) when a low signal to the EN pin which enables a whole IC circuit put into OFF state, is inputted via the N-channel transistor located between the VOUT pin and the VSS pin. When the IC is disabled, electric charge at the output capacitor (CL) is quickly discharged so that it could avoids malfunction. At that time, CL discharge resistance is depended on a bias voltage. Discharge time of the output capacitor (CL) is set by the CL auto-discharge resistance (R) and the output capacitor (CL). By setting time constant of a CL auto-discharge resistance value [R] and an output capacitor value (CL) as ( =C x R), the output voltage after discharge via the N channel transistor is calculated by the following formulas. V = VOUT x e -t/ , or =ln VOUT(E) / V V : Output voltage after discharge, VOUT(E) : Output voltage, t: Discharge time, : CL auto-discharge resistance R Output capacitor (CL) value C The XC6601 series' foldback circuit operates as an output current limiter and a short protection of the output pin. When the load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops. When the output pin is shorted to the VSS level, current flows about 50mA. When the junction temperature of the built-in driver transistor reaches the temperature limit level (150 TYP.), the thermal shutdown circuit operates and the driver transistor will be set to OFF. The IC resumes its operation when the thermal shutdown function is released and the IC's operation is automatically restored because the junction temperature drops to the level of the thermal shutdown release temperature (125 TYP.).
When the VBIAS pin voltage drops below 2.0V (TYP.) or VIN pin voltage drops below 0.4V (TYP.), the output driver transistor is forced OFF by U.V.L.O. function to prevent false output caused by unstable operation of the internal circuitry. When the VBIAS pin voltage rise at 2.2V (TYP.) or the VIN pin voltage rises at 0.4V (TYP.), the U.V.L.O. function is released. The driver transistor is turned on in the state and start to operate voltage regulation. The IC internal circuitry can be shutdown via the signal from the CE pin with the XC6601 series. In shutdown mode, output at the VOUT pin will be pulled down to the VSS level via R1 & R2. However, as for the XC6601 series, the CL auto-discharge resistor is connected in parallel to R1 and R2 while the power supply is applied to the VIN pin. Therefore, time until the VOUT pin reaches the VSS level becomes short. The CE pin of XC6601A has pull-down circuitry so that CE input current increase during IC operation. The CE pin of XC6601B does not have pull-down circuitry so that logic is not fixed when the CE pin is open. If the CE pin voltage is taken from VBIAS pin or VSS pin then logic is fixed and the IC will operate normally. However, supply current may increase as a result of through current in the IC's internal circuitry when medium voltage is input.
NOTE ON USE
1. 2. 3. Please use this IC within the stated absolute maximum ratings. The IC is liable to malfunction should the ratings be exceeded. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current. Please keep the resistance low between VBIAS and VSS wiring or VIN and VSS wiring in particular. Please wire the bias capacitor (CBIAS), input capacitor (CIN) and the output capacitor (CL) as close to the IC as possible. Capacitance values of these capacitors (CBIAS, CIN, CL) are decreased by the influences of bias voltage and ambient temperature. Care shall be taken for capacitor selection to ensure stability of phase compensation from the point of ESR influence.
8/11
XC6601
Series
TEST CIRCUITS
Circuit
Circuit
9/11
XC6601 Series
PACKAGING INFORMATION
USP-6C
USP-6C Recommended Pattern Layout
USP-6C Recommended Metal Mask Design
SOT-25
SOT-89-5
10/11
XC6601
Series
1. The products and product specifications contained herein are subject to change without notice to improve performance characteristics. Consult us, or our representatives before use, to confirm that the information in this catalog is up to date. 2. We assume no responsibility for any infringement of patents, patent rights, or other rights arising from the use of any information and circuitry in this catalog. 3. Please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this catalog. 4. The products in this catalog are not developed, designed, or approved for use with such equipment whose failure of malfunction can be reasonably expected to directly endanger the life of, or cause significant injury to, the user. (e.g. Atomic energy; aerospace; transport; combustion and associated safety equipment thereof.) 5. Please use the products listed in this catalog within the specified ranges. Should you wish to use the products under conditions exceeding the specifications, please consult us or our representatives. 6. We assume no responsibility for damage or loss due to abnormal use. 7. All rights reserved. No part of this catalog may be copied or reproduced without the prior permission of Torex Semiconductor Ltd.
11/11

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