500mA Low-Dropout Linear Regulator in MSOP Package Preliminary Technical Data ADP1715/ADP1716 GENERAL DESCRIPTION FEATURES 16 Fixed Output Voltage Options from 0.75V to 3.3V Adjustable Output Voltage from 0.8V to 5V Wide 2.5V to 5.5V Input Voltage Range Low Dropout Voltage: 250 mV @500mA 1% Initial Accuracy High PSRR (60dB @1kHz) 1 A Shutdown Current Adjustable Soft-Start Option Available Output Voltage Tracking Option Available Optimized for Small Ceramic Capacitors Thermal Overload Protection Short Circuit Protection Small Thermally-Enhanced MSOP Package The ADP1715/16 is a 500mA low-dropout linear regulator that uses an advanced, proprietary architecture to provide high power supply rejection ratio (PSRR) and excellent line and load transient response with just a small 2.2F ceramic output capacitor. Supply current in shutdown mode is reduced to less than 1A. APPLICATIONS Telecom Equipment Network Equipment DSP/FPGA/Microprocessor Supplies Instrumentation Equipment/Data Acquisition Systems Three versions of this part are available: one with fixed output voltage and variable soft-start, one with fixed output voltage and output voltage tracking, and one with adjustable output voltage and fixed soft start. The fixed output voltage is internally set to one of sixteen values between 0.75V and 3.3V while the adjustable output voltage can be set between 0.8V and 5.0V by an external voltage divider from OUT to ADJ. The variable soft-start uses an external capacitor at SS to control the output voltage ramp while the internal soft-start uses a 3pF capacitor to give a constant 24s ramp. Tracking limits the output voltage to the at-or-below voltage at the TRK pin. The ADP1715/16 is available in a thermally-enhanced MSOP package, making it a very compact solution for applications requiring up to 500mA of output current in a small, lowprofile footprint. PIN CONFIGURATION TYPICAL APPLICATION CIRCUIT Figure 1. ADP1715/16 typical operation circuit Rev. PrA Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.461.3113 (c) 2006 Analog Devices, Inc. All rights reserved. Rev. PrA | Page 1 of 9 ADP1715/ADP1716 PRELIMINARY TECHNICAL DATA ADP1715/16 TARGET SPECIFICATIONS Table 1. Electrical Characteristics VIN = 5V, IOUT = 100mA, CLOAD = 2.2F, TA = 25C, BOLD values indicate spec applies over TJ=-40C to 125C, unless otherwise noted. Parameter Input Voltage Operating Supply Current Shutdown Supply Current Fixed Output Voltage Accuracy ADJ Regulation Votlage ADJ Inupt Bias Current Line Regulation Load Regulation Dropout Voltage (Note 1) Current Limit Threshold Thermal Shutdown Temperature SS Source Current SS Pull Up Voltage SS Pull Down Resistance TRK to OUT Accuracy EN Input High EN Input Low EN Input Leakage Current PSRR Output Noise Conditions 100uA 100mA 500mA EN = GND IOUT = 10mA 10mA < IOUT < 500mA 10mA < IOUT < 500mA, TA = -40C to 85C IOUT = 10mA 10mA < IOUT < 500mA VADJ=VOUT VIN = (VOUT + 0.5V) to 5.5V, IOUT = 1mA 10mA < IOUT < 500mA IOUT = 100mA IOUT = 500mA VOUT = 0.9 x VOUT(NOM) Typical Thermal Hysteresis = 15C ADP1715 Only, SS =GND Min 2.5 Typ 80 0.1 -1 -2 -3 792 784 -0.15 550 0.8 ADP1715, (Not to be inlduced in final data sheet, design spec only) ADP1715, EN = GND (Not to be included on final data sheet, design spec only) ADP1716-XX Only, VTRK = 0.5 x VOUT(NOM) 1.0 2.5V VIN 5.5V 2.5V VIN 5.5V EN = IN or GND 1kHz, Iout = 500mA 1.8 800 0 0.01 125 250 TBD 150 1 Max 5.5 90 Unit V A 1.0 +1 +2 +3 808 816 +0.15 0.04 250 A % % % mV mV nA %/V %/A mV 850 mA 1.2 C A V 1.5 12 -50 -0.1 0 0 60 TBD 50 0.8 +0.1 mV V V A dB uVrms Notes: 1. Dropout voltage is defined as the input to output voltage differential when the input voltage is set to the nominal output voltage. Applies for output voltages above 2.5V only. Rev. PrA | Page 2 of 9 PRELIMINARY TECHNICAL DATA ADP1715/ADP1716 ABSOLUTE MAXIMUM RATINGS Table 2 Absolute Maximum Ratings (at 25C, unless otherwise noted) Parameter IN, OUT, EN, TRK, ADJ, SS to GND OUT to IN Maximum Output Current Storage Temperature Range Operating Junction Temperature Range Maximum Junction Temperature Lead Temperature Range (Soldering, 10sec) Rating 6V -0.3V to (VIN + 0.3V) TBD -65C to +150C -40C to +125 C 150C 300C Table 3 Thermal Resistance Package Type 8-lead Thermally Enhanced MSOP JA TBD 1 Unit C/W JA is specified for the worst-case conditions, i.e., JA is specified for device soldered in circuit board for surface mount packages. 1 ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although these products feature proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. PrA | Page 3 of 9 PRELIMINARY TECHNICAL DATA ADP1715/ADP1716 PIN DESCRIPTION Table 4. Pin numbers are Preliminary and Subject To Change) Pin Number ADP1715 -XXX ADP1716 Description -ADJ 2 IN IN IN Power Source Input. IN is the source input to the LDO. Connect the input voltage to IN. Bypass IN to GND with a 2.2F or greater capacitor. 3 OUT OUT OUT Regulated Votlage Output. OUT is the output voltage of the LDO. Bypass OUT to GND with a 2.2F or greater capacitor 1 EN EN EN 4 SS Soft-Start Control Input. Connect a capacitor from SS to GND to set the softstart period. A 10nF capacitor sets the soft-start period to 8ms. If not used, the part will have a fixed startup ramp of 24s. ADJ 5, 6, 7, 8 GND Enable Input. The ADP1715/16 is turned on/off by the state of EN. Drive EN high to turn on the LDO, drive it low to turn it off. For automatic startup, connecte EN to IN. GND Adjustable Output Voltage Control Input. A resistive voltage divider from OUT to ADJ sets the output voltage for adjustable output voltage versions. These parts will have a fixed startup ramp of 24s. TRK Tracking Input. A voltage applied to TRK limits the output voltage. To force the output votlage to track an external signal, drive TRK with that signal. If not used, connect TRK to IN. GND Ground. PIN CONFIGURATIONS: Rev. PrA | Page 4 of 9 PRELIMINARY TECHNICAL DATA ADP1715/ADP1716 TYPICAL PERFORMANCE CHARACTERISTICS 2.502 10.010 10.005 10.000 VOUT - V VOUT - V 2.501 9.995 2.500 2.499 9.990 2.498 -40 -25 9.985 -40 0 25 o TEMPERATURE - C 85 125 35 20 65 50 o TEMPERATURE - C 80 95 110 125 Figure 3. Output Voltage vs. Temperature 5.008 0.8 5.004 0.7 SUPPLY CURRENT - mA VOUT - V Figure 1. Output Voltage vs. Load Current 5 -10 5.000 4.996 o +125 C 0.6 o +25 C o -40 C 0.5 0.4 4.992 -40 0 25 o TEMPERATURE - C 85 125 12 16 20 24 28 32 INPUT VOLTAGE - V 36 Figure 4.Ground Current vs. Load Current Figure 2.Ground Current vs. Input Voltage Rev. PrA | Page 5 of 9 40 PRELIMINARY TECHNICAL DATA ADP1715/ADP1716 0.8 40 IL = 0 TO 10mA LOAD REGULATION - ppm/mA INPUT CURRENT - mA 30 o +125 C 0.7 o +25 C 0.6 -40oC 0.5 VIN = 40V 20 10 0 VIN = 14V -10 -20 -30 0.4 8 12 16 20 24 28 32 36 -40 -40 40 0 50 25 85 INPUT VOLTAGE - V TEMPERATURE - oC Figure 5. Ground Current vs., Temperature Figure 7. Dropout Voltage vs. Load Current 125 50 0.85 IL = 0 TO 5mA 40 LOAD REGULATION - ppm/mA SUPPLY CURRENT - mA 0.80 0.75 0.70 +125oC 0.65 o +25 C 0.60 0.55 o -40 C 0.50 30 VIN = 40V 20 10 0 VIN = 8V -10 0.45 -20 0.40 5 10 15 20 30 25 INPUT VOLTAGE - V 35 -40 40 0 25 85 TEMPERATURE - oC Figure 8.Load Transient Response Figure 6. PSRR vs. Frequency Rev. PrA | Page 6 of 9 125 PRELIMINARY TECHNICAL DATA ADP1715/ADP1716 THEORY OF OPERATION Introduction The ADP1715/16 is a low-dropout linear regulator that uses an advanced, proprietary architecture to provide high power supply rejection ratio (PSRR) and excellent line and load transient response with just a small 2.2F ceramic output capacitor. Supply current in shutdown mode is reduced to 1A. Three versions are available: one with fixed output voltage and soft-start, one with fixed output voltage and output voltage tracking, and one with adjustable output voltage. The fixed output voltage is internally set to one of sixteen values between 0.75V and 3.3V. The adjustable output voltage is set between 0.8V and 5.0V by an external voltage divider from OUT to ADJ. The soft-start uses an external capacitor at SS to control the output voltage ramp. In the case of the adjustable version, ADP1715-ADJ, the soft-start is controlled by an internal 3pF capacitor, limiting the output voltage rampup period to approximately 24s. Tracking limits the output voltage to the at-or-below the voltage at TRK. The ADP1715/16 is available in a thermally-enhanced MSOP package, making it a very compact solution for applications requiring up to 500mA in a small, low-profile footprint. Soft-start Function (ADP1715) For applications that require a controlled startup, the ADP1715 provides a programmable soft-start function. Programmable soft-start is useful for reducing inrush current upon startup and for providing voltage sequencing. To implement soft-start, connect a capacitor from SS to GND. Upon startup, a 1A current source charges the capacitor. The ADP1715 startup output voltage is limited by the voltage at SS, providing a smooth ramp up to the nominal output voltage. The soft-start time is calculated by TSS= VREF x (CSS/ISS), where TSS is the soft-start period, VREF is the 0.8V reference voltage, CSS is the soft-start capacitance from SS to GND, and ISS is the current sourced from SS (1A). Note that when the ADP1715 is disabled, the soft-start capacitor is discharged to GND through an internal 100 resistor. In the case of the adjustable output version, there is no pin for soft-start, so the function is switched to an internal 3pF capacitor. This sets the soft-start ramp-up period to approximately 24s. Using the suggested 2.2F output capacitor, the resulting input inrush current is approximately 460mA, which is less than the maximum 500mA load current. Voltage Tracking Function (ADP1716) For applications that require voltage tracking, the ADP1716 provides a TRK pin. The ADP1716's output voltage is not allowed to exceed the voltage on the TRK pin, allowing control of the output voltage of the ADP1716 by another voltage rail in the system. The ADP1716's tracking function is always enabled, hence if the voltage applied to TRK pin drops below the output voltage at any time, the ADP1716's output tracks it down. This ensures that the ADP1716 provides proper voltage tracking under startup and shutdown as well as under fault conditions. The ADP1716 is only available in the fixed output voltage version. A voltage divider is present from TRK to the error amplifier input whose divider ratio is equal to the divider from OUT to the error amplifier. This sets the output voltage equal to the tracking voltage. Both divider ratios are set by postpackage trim depending on the desired output voltage. Output Capacitor Selection The ADP1715/16 is optimized for operation with small ceramic capacitors. For output voltages, VOUT 2V, the ADP1715/16 operates with just 2.2F of output capacitance. For output voltages below 1.8V, additional output capacitance may be required. Ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior over temperature and applied voltage. When choosing your capacitor be sure to choose a dielectric adequate to ensure the minimum capacitance over the necessary temperature range. Thermal Protection and Current Limit The ADP1715/16 contains internal current limiting to protect itself and it's loads during overload and short-circuit conditions. In addition to current limiting, this device contains automatic thermal overload protection circuitry to provide additional protection under continuous short-circuit conditions. Adjustable Output Voltage The ADP1715-ADJ's output voltage is adjustable over a 0.8V to 5.0V range. The output voltage is set by connecting a resistive voltage divider from OUT to ADJ. The output voltage is calculated using the equation VOUT=0.8V(1+RTOP/RBOTTOM) where RTOP is the resistor from OUT to ADJ and RBOTTOM is the resistor from ADJ to GND. The maximum bias current into ADJ is 100nA, so for less than 0.1% error due to the bias current, use values less than 12k for RBOTTOM. Shutdown The ADP1715/16 includes a low power shutdown state entered by driving EN to GND. In shutdown, power consumption is 1A. When the ADP1715-XX is disabled, the soft-start capacitor CSS is discharged to GND with a 100 resistance. Package and Power Dissipation The ADP1715/16 use a thermally-enhanced MSOP package, which achieves a respectable TBDC/W for such a small footprint. Rev. PrA | Page 7 of 9 PRELIMINARY TECHNICAL DATA ADP1715/ADP1716 OUTLINE DIMENSIONS Rev. PrA | Page 8 of 9 PRELIMINARY TECHNICAL DATA ORDERING GUIDE ADP1715/ADP1716 Tracking Option 0.75V 0.80V Variable Softstart Option Yes Yes ADP1715-085 ADP1715-090 ADP1715-095 0.85V 0.90V 0.95V ADP1715-100 ADP1715-105 Temperature Range (C) TBD TBD No. of Parts per Reel TBD TBD RN RN RN TBD TBD TBD TBD TBD TBD -40C to +125C -40C to +125C -40C to +125C 8-lead MSOP 8-lead MSOP RN RN TBD TBD TBD TBD -40C to +125C -40C to +125C No No 8-lead MSOP 8-lead MSOP RN RN TBD TBD TBD TBD -40C to +125C -40C to +125C Yes Yes Yes No No No 8-lead MSOP 8-lead MSOP 8-lead MSOP RN RN RN TBD TBD TBD TBD TBD TBD -40C to +125C -40C to +125C -40C to +125C 1.80V 2.50V Yes Yes No No 8-lead MSOP 8-lead MSOP RN RN TBD TBD TBD TBD -40C to +125C -40C to +125C ADP1715-300 ADP1715-330 ADP1715-ADJ 3.00V 3.30V 0.8V to 5.0V Yes Yes No No No No 8-lead MSOP 8-lead MSOP 8-lead MSOP RN RN RN TBD TBD TBD TBD TBD TBD -40C to +125C -40C to +125C -40C to +125C ADP1716-075 ADP1716-080 0.75V 0.80V No No Yes Yes 8-lead MSOP 8-lead MSOP RN RN TBD TBD TBD TBD -40C to +125C -40C to +125C ADP1716-085 ADP1716-090 0.85V 0.90V No No Yes Yes 8-lead MSOP 8-lead MSOP RN RN TBD TBD TBD TBD -40C to +125C -40C to +125C ADP1716-095 ADP1716-100 ADP1716-105 0.95V 1.00V 1.05V No No No Yes Yes Yes 8-lead MSOP 8-lead MSOP 8-lead MSOP RN RN RN TBD TBD TBD TBD TBD TBD -40C to +125C -40C to +125C -40C to +125C ADP1716-110 ADP1716-115 1.10V 1.15V No No Yes Yes 8-lead MSOP 8-lead MSOP RN RN TBD TBD TBD TBD -40C to +125C -40C to +125C ADP1716-120 ADP1716-130 ADP1716-150 1.20V 1.30V 1.50V No No No Yes Yes Yes 8-lead MSOP 8-lead MSOP 8-lead MSOP RN RN RN TBD TBD TBD TBD TBD TBD -40C to +125C -40C to +125C -40C to +125C ADP1716-180 ADP1716-250 1.80V 2.50V No No Yes Yes 8-lead MSOP 8-lead MSOP RN RN TBD TBD TBD TBD -40C to +125C -40C to +125C ADP1716-300 ADP1716-330 3.00V 3.30V No No Yes Yes 8-lead MSOP 8-lead MSOP RN RN TBD TBD TBD TBD -40C to +125C -40C to +125C ADP1715/16 Output Voltage VO (V) ADP1715-075 ADP1715-080 Package Description Package Option Top Mark1 No No 8-lead MSOP 8-lead MSOP RN RN Yes Yes Yes No No No 8-lead MSOP 8-lead MSOP 8-lead MSOP 1.00V 1.05V Yes Yes No No ADP1715-110 ADP1715-115 1.10V 1.15V Yes Yes ADP1715-120 ADP1715-130 ADP1715-150 1.20V 1.30V 1.50V ADP1715-180 ADP1715-250 Rev. PrA | Page 9 of 9 -40C to +125C -40C to +125C PR06110-0-4/06(PrA) TABLE 5