LX8117B-28CDD

LIN D O C # : 8117 LX8117-xx/8117A-xx/8117B-xx 0.8, 1 & 1.2A L O W D R O P O U T P O S I T I V E R E G U L AT O R S T HE I NFINITE P OWER OF I N N O VAT I O N P RODUCTION D ATA S HEET DESCRIPTION The LX8117/8117A/8117B series are positive Low Dropout (LDO) regulators. At the designed maximum load current, the LX8117 series dropout voltage is guaranteed to be 1.2V or lower at 0.8A (LX8117A 1.3V @ 1A). The dropout voltage decreases with load current. An adjustable output voltage version of the LX8117/17A/17B is available, as well as versions with fixed outputs of 2.5V, 2.85V, 3.3V and 5V. The 2.85V version is specifically designed for use as a component of active termination networks for the SCSI bus. On-chip trimming of the internal voltage reference allows specification of the initial output voltage to within ±1% of its nominal value. The output current-limit point is also trimmed, which helps to minimize stress on both the regulator and the system power source when they are operated under short-circuit conditions. The regulator's internal circuitry will operate at input-to-output differential voltages down to 1V. Most regulator circuit designs include output capacitors with values in the range of tens to hundreds of microfarads or more. The LX8117/17A/17B typically requires at least 10µF of output capacitance for stable operation. PNP-type regulators can waste current equal to as much as 10 percent of their output as a quiescent current which flows directly to ground, bypassing the load. Quiescent current from the LX8117/17A/ 17B flows through the load, increasing power-use efficiency and allowing cooler operation. The LX8117 is available in low-profile plastic SOT-223 and D-Pak packages for applications where space is at a premium. The LX8117 is also available in a plastic TO-263 package for instances when the thermal resistance from the circuit die to the environment must be minimized. K E Y F E AT U R E S s 0.2% Line Regulation Maximum s 0.4% Load Regulation Maximum s Output Current Of 800mA s Regulates Down To 1.2V Dropout (LX8117) And 1.3V Dropout (LX8117A) s Operates Down To 1V Dropout s Space Saving SOT-223 Surface Mount Package s Guaranteed Dropout Voltage At Multiple Current Levels s Three-Terminal Adjustable Or Fixed 2.5V, 2.85V, 3.3V & 5V A P P L I C AT I O N S s s s s s Battery Chargers Active SCSI Terminators 5V To 3.3V Linear Regulators High-Efficiency Linear Regulators Post Regulators For Switching Supplies PER A VA I L A B L E O P T I O N S Part # P A RT # Output Voltage Adjustable 2.5V 2.85V 3.3V 5V NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com. PRODUCT HIGHLIGHT ACTIVE TERMINATOR FOR SCSI-2 BUS 110Ω 110Ω LX8117/8117A/8117B-00 LX8117/8117A/8117B-25 LX8117/8117A/8117B-28 LX8117/8117A/8117B-33 LX8117/8117A/8117B-05 LX8117-28 IN 4.75V to 5.25V GND 10µF 22µF OUT 110Ω 18 to 27 Lines 110Ω PA C K A G E O R D E R I N F O R M AT I O N TA (°C) O/P Current 0.8A 1.0A 1.2A ST Plastic SOT-223 3-pin LX8117-xxCST LX8117A-xxCST LX8117B-xxCST DD Plastic T0-263 3-pin LX8117-xxCDD LX8117A-xxCDD LX8117B-xxCDD DT Plastic T0-252 (D-Pak) 3-pin LX8117-xxCDT LX8117A-xxCDT LX8117B-xxCDT 0 to 125 Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number (i.e. LX8117-28CSTT). "xx" refers to output voltage, please see table above. Copyright © 1999 Rev. 1.4 3/99 LINFINITY MICROELECTRONICS INC. 11861 W ESTERN A VENUE, G ARDEN G ROVE, CA. 92841, 714-898-8121, F AX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 LX8117-xx/8117A-xx/8117B-xx 0.8, 1 & 1.2A L O W D R O P O U T P O S I T I V E R E G U L AT O R S P RODUCTION D ATA S HEET PACKAGE PIN OUTS TAB IS V OUT 3. IN 2. OUT 1. ADJ / GND A B S O LUT E M AXIM UM R ATINGS (Note 1) Power Dissipation .................................................................................. Internally Limited Input Voltage LX8117-00/8117A-00/8117B-00 (Adj.) ..................................................................... 15V LX8117-33/8117A-33/8117B-33 (3.3V), LX8117-05/8117A-05/8117B-05 (5.0V) .... 15V LX8117-25/8117A-25/8117B-25 (2.5V), LX8117-28/8117A-28/8117B-28 (2.85V) .. 12V Surge Voltage ............................................................................................................... 15V Operating Junction Temperature Plastic (ST, DD & DT Packages) .......................................................................... 150°C Storage Temperature Range ...................................................................... -65°C to 150°C Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C Short-Circuit Protection ....................................................................................... Indefinite Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. ST PACKAGE (Top View) TAB IS VOUT 3 2 1 IN OUT ADJ / GND T H E R MAL DATA ST PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA DD PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA DT PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJC THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 9°C/W *80°C/W 10°C/W *60°C/W TAB IS V OUT 15°C/W *150°C/W DD PACKAGE (D2 Pak) (Top View) 3. IN 2. OUT 1. ADJ / GND Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. * θ JAcan be improved with package soldered to 0.5IN2 copper area over backside ground plane or internal power plane. θJAcan vary from 20ºC/W to > 40ºC/W depending on mounting technique. (See Application Notes Section: Thermal Considerations) DT PACKAGE (D-Pak) (Top View) BLOCK D IA GR A M VIN Bias Circuit Thermal Limit Circuit Bandgap Circuit Control Circuit Output Circuit VOUT ADJ Current Limit Circuit 2 Copyright © 1999 Rev. 1.4 3/99 PRODUCT DATABOOK 1996/1997 LX8117-xx/8117A-xx/8117B-xx 0.8, 1 & 1.2A L O W D R O P O U T P O S I T I V E R E G U L AT O R S P RODUCTION D ATA S HEET (Note 2) R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S Parameter Input Voltage Operating Voltage Symbol Recommended Operating Conditions Min. Typ. Max. 15 12 10 125 Units LX8117(A/B)-00 / 8117(A/B)-05 LX8117(A/B)-25 / -28 / -33 Input-Output Differential LX8117(A/B)-00 Operating Ambient Temperature Range Note 2. Range over which the device is functional. 0 V V V °C ELECTRICAL CHARACTERISTICS (Unless otherwise specified: 0°C ≤ TJ ≤ 125°C, IMAX = 0.8A for the LX8117-xx, I MAX = 1.0A for the LX8117A-xx, and IMAX = 1.2A for the LX8117B-xx.) LX8117-00 / 8117A-00 / 8117B-00 (Adjustable) Parameter Reference Voltage Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage (Note 4) LX8117-00 LX8117A/B-00 Current Limit LX8117-00 LX8117A-00 LX8117B-00 Minimum Load Current (Note 5) Thermal Regulation Ripple Rejection Adjust Pin Current Adjust Pin Current Change Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) Symbol VREF Test Conditions LX8117 / 17A / 17B-00 Min. Typ. Max. 1.238 1.225 1.250 1.250 0.05 0.15 0.97 1.00 1.05 1.15 950 1200 1500 0.5 0.08 75 45 0.2 0.5 0.3 0.003 1.262 1.270 0.2 0.4 1.10 1.15 1.20 1.30 Units V V % % V V V V mA mA mA mA %/W dB µA µA % % % IOUT = 10mA, (VIN - VOUT) = 2V, TJ = 25°C 10mA ≤ IOUT ≤ IOUT (MAX), 1.4V ≤ (VIN - VOUT ) ≤ 10V ∆VREF(VIN) IOUT = 10mA, 1.5V ≤ (VIN - VOUT ) ≤ 7V ∆VREF (IOUT) (VIN - VOUT) = 3V, 10mA ≤ IOUT ≤ IOUT (MAX) ∆V IOUT = 100mA IOUT = 500mA IOUT = IOUT (MAX) I OUT = IOUT (MAX) IOUT (MAX) (VIN - VOUT) = 5V, TJ = 25°C (VIN - VOUT) = 5V, TJ = 25°C (VIN - VOUT) = 5V, TJ = 25°C I OUT (MIN) VIN ≤ 10V ∆VOUT (Pwr) TA = 25°C, 30ms pulse fRIPPLE =120Hz, (VIN - V OUT) = 3V, VRIPPLE = 1Vp-p I ADJ ∆IADJ 10mA ≤ IOUT ≤ IOUT (MAX) , 1.4V ≤ (VIN - VOUT) ≤ 10V ∆VOUT (T) ∆VOUT (t) TA = 125°C, 1000 hours VOUT (RMS) 10Hz ≤ f ≤ 10kHz 800 1000 1200 5 0.2 100 5 60 Notes: 3. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 4. Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage Curve. 5. Minimum load current is defined as the minimum output current required to maintain regulation. (Other Voltage Options on following pages.) Copyright © 1999 Rev. 1.4 3/99 3 PRODUCT DATABOOK 1996/1997 LX8117-xx/8117A-xx/8117B-xx 0.8, 1 & 1.2A L O W D R O P O U T P O S I T I V E R E G U L AT O R S P RODUCTION D ATA S HEET (continued) ELECTRICAL CHARACTERISTICS LX8117-25 / 8117A-25 / 8117B-25 (2.5V Fixed) Parameter Output Voltage Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage (Note 4) LX8117-25 LX8117A/B-25 LX8117-25 LX8117A-25 LX8117B-25 Symbol VOUT Test Conditions LX8117 / 17A / 17B-25 Min. Typ. Max. 2.475 2.450 2.500 2.500 1 2 0.97 1.00 1.05 1.15 950 1200 1500 4.5 0.08 75 0.5 0.3 0.003 2.525 2.550 6 10 1.10 1.15 1.20 1.30 Units V V mV mV V V V V mA mA mA mA %/W dB % % % Current Limit Quiescent Current Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) IOUT = 10mA, VIN = 5V, TA = 25°C 0mA ≤ IOUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V ∆V OUT(VIN) IOUT = 0mA, 4.25V ≤ VIN ≤ 10V ∆VOUT (IOUT) VIN = 4.25V, 0mA ≤ IOUT ≤ IOUT (MAX) ∆V IOUT = 100mA IOUT = 500mA IOUT = IOUT (MAX) I OUT = IOUT (MAX) IOUT (MAX) (VIN - VOUT) = 5V, TJ = 25°C (VIN - VOUT) = 5V, TJ = 25°C (VIN - VOUT) = 5V, TJ = 25°C IQ VIN ≤ 10V ∆VOUT (Pwr) TA = 25°C, 30ms pulse fRIPPLE =120Hz, (VIN - V OUT) = 3V, VRIPPLE = 1Vp-p ∆VOUT (T) ∆VOUT (t) TA = 125°C, 1000 hours VOUT (RMS) 10Hz ≤ f ≤ 10kHz 800 1000 1200 10 0.2 60 LX8117-28 / 8117A-28 / 8117B-28 (2.8V Fixed) Parameter Output Voltage Symbol VOUT Test Conditions LX8117 / 17A / 17B-28 Min. Typ. Max. 2.820 2.790 2.790 2.850 2.850 2.850 1 2 0.97 1.00 1.05 1.15 950 1200 1500 4.5 0.08 75 0.5 0.3 0.003 2.880 2.910 2.910 6 10 1.10 1.15 1.20 1.30 Units V V V mV mV V V V V mA mA mA mA %/W dB % % % Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage (Note 4) LX8117-28 LX8117A/B-28 LX8117-28 LX8117A-28 LX8117B-28 Current Limit Quiescent Current Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) IOUT = 10mA, VIN = 4.85V, TA = 25°C 0mA ≤ IOUT ≤ IOUT (MAX) , 4.25V ≤ VIN ≤ 10V 0mA ≤ IOUT ≤ 500mA, VIN = 3.95V ∆V OUT(VIN) IOUT = 0mA, 4.25V ≤ VIN ≤ 10V ∆VOUT (IOUT) VIN = 4.25V, 0mA ≤ IOUT ≤ IOUT (MAX) ∆V IOUT = 100mA IOUT = 500mA IOUT = IOUT (MAX) I OUT = IOUT (MAX) IOUT (MAX) (VIN - VOUT) = 5V, TJ = 25°C (VIN - VOUT) = 5V, TJ = 25°C (VIN - VOUT) = 5V, TJ = 25°C IQ VIN ≤ 10V ∆VOUT (Pwr) TA = 25°C, 30ms pulse fRIPPLE =120Hz, (VIN - V OUT) = 3V, VRIPPLE = 1Vp-p ∆VOUT (T) ∆VOUT (t) TA = 125°C, 1000 hours VOUT (RMS) 10Hz ≤ f ≤ 10kHz 800 1000 1200 10 0.2 60 Notes: 3. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 4. Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage Curve. 5. Minimum load current is defined as the minimum output current required to maintain regulation. 4 Copyright © 1999 Rev. 1.4 3/99 PRODUCT DATABOOK 1996/1997 LX8117-xx/8117A-xx/8117B-xx 0.8, 1 & 1.2A L O W D R O P O U T P O S I T I V E R E G U L AT O R S P RODUCTION D ATA S HEET (continued) ELECTRICAL CHARACTERISTICS LX8117-33 / 8117A-33 / 8117B-33 (3.3V Fixed) Parameter Output Voltage Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage (Note 4) LX8117-33 LX8117A/B-33 LX8117-33 LX8117A-33 LX8117B-33 Symbol V OUT Test Conditions LX8117 / 17A / 17B-33 Min. Typ. Max. 3.267 3.235 3.300 3.300 1 2 0.97 1.00 1.05 1.15 950 1200 1500 4.5 0.08 75 0.5 0.3 0.003 3.333 3.365 6 10 1.10 1.15 1.20 1.30 Units V V mV mV V V V V mA mA mA mA %/W dB % % % Current Limit Quiescent Current Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) IOUT = 10mA, VIN = 5V, TA = 25°C 0mA ≤ IOUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V ∆V OUT(VIN) IOUT = 0mA, 4.25V ≤ VIN ≤ 10V ∆V OUT (IOUT) VIN = 4.25V, 0mA ≤ IOUT ≤ IOUT (MAX) ∆V IOUT = 100mA IOUT = 500mA IOUT = IOUT (MAX) IOUT = IOUT (MAX) I OUT (MAX) (VIN - VOUT ) = 5V, TJ = 25°C (VIN - VOUT ) = 5V, TJ = 25°C (VIN - VOUT ) = 5V, TJ = 25°C IQ VIN ≤ 10V ∆V OUT (Pwr) TA = 25°C, 30ms pulse fRIPPLE =120Hz, (VIN - VOUT ) = 3V, VRIPPLE = 1Vp-p ∆VOUT (T) ∆VOUT (t) TA = 125°C, 1000 hours VOUT (RMS) 10Hz ≤ f ≤ 10kHz 800 1000 1200 10 0.2 60 LX8117-05 / 8117A-05 / 8117B-05 (5.0V Fixed) Parameter Output Voltage Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage (Note 4) LX8117-05 LX8117A/B-05 LX8117-05 LX8117A-05 LX8117B-05 Symbol V OUT Test Conditions LX8117 / 17A / 17B-05 Min. Typ. Max. 4.950 4.900 5.000 5.000 1 2.5 0.97 1.00 1.05 1.15 950 1200 1500 4.5 0.08 75 0.5 0.3 0.003 5.050 5.100 10 15 1.10 1.15 1.20 1.30 Units V V mV mV V V V V mA mA mA mA %/W dB % % % Current Limit Quiescent Current Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) IOUT = 10mA, VIN = 7V, TA = 25°C 0mA ≤ IOUT ≤ IOUT (MAX) , 6.50V ≤ VIN ≤ 10V ∆V OUT(VIN) IOUT = 0mA, 6.5V ≤ VIN ≤ 10V ∆V OUT (IOUT) VIN = 6.5V, 0mA ≤ IOUT ≤ IOUT (MAX) ∆V IOUT = 100mA IOUT = 500mA IOUT = IOUT (MAX) IOUT = IOUT (MAX) I OUT (MAX) (VIN - VOUT ) = 5V, TJ = 25°C (VIN - VOUT ) = 5V, TJ = 25°C (VIN - VOUT ) = 5V, TJ = 25°C IQ VIN ≤ 10V ∆V OUT (Pwr) TA = 25°C, 30ms pulse fRIPPLE =120Hz, (VIN - VOUT ) = 3V, VRIPPLE = 1Vp-p ∆VOUT (T) ∆VOUT (t) TA = 125°C, 1000 hours VOUT (RMS) 10Hz ≤ f ≤ 10kHz 800 1000 1200 10 0.2 60 Notes: 3. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 4. Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage Curve. 5. Minimum load current is defined as the minimum output current required to maintain regulation. Copyright © 1999 Rev. 1.4 3/99 5 PRODUCT DATABOOK 1996/1997 LX8117-xx/8117A-xx/8117B-xx 0.8, 1 & 1.2A L O W D R O P O U T P O S I T I V E R E G U L AT O R S P RODUCTION D ATA S HEET A P P L I C AT I O N N O T E S The LX8117 series ICs are easy to use Low-Dropout (LDO) voltage regulators. They have all of the standard self-protection features expected of a voltage regulator: short circuit protection, safe operating area protection and automatic thermal shutdown if the device temperature rises above approximately 165°C. Use of an output capacitor is REQUIRED with the LX8117 series. Please see the table below for recommended minimum capacitor values. These regulators offer a more tightly controlled reference voltage tolerance and superior reference stability when measured against the older pin-compatible regulator types that they replace. STABILITY The output capacitor is part of the regulator’s frequency compensation system. Many types of capacitors are available, with different capacitance value tolerances, capacitance temperature coefficients, and equivalent series impedances. For all operating conditions, connection of a 220µF aluminum electrolytic capacitor or a 47µF solid tantalum capacitor between the output terminal and ground will guarantee stable operation. If a bypass capacitor is connected between the output voltage adjust (ADJ) pin and ground, ripple rejection will be improved (please see the section entitled “RIPPLE REJECTION”). When ADJ pin bypassing is used, the required output capacitor value increases. Output capacitor values of 220µF (aluminum) or 47µF (tantalum) provide for all cases of bypassing the ADJ pin. If an ADJ pin bypass capacitor is not used, smaller output capacitor values are adequate. The table below shows recommended minimum capacitance values for stable operation. RECOMMENDED CAPACITOR VALUES INPUT 10µF 10µF Power Supply IN LX8117-xx ADJ OUT Minumum Load (Larger resistor) Full Load (Smaller resistor) C1 C2 RDSON