Analog Microelectronics, Inc. INARY PRELIM AME8817 n General Description 1.5A CMOS LDO n Features The AME8817 family of positive, linear regulators feature low quiescent current (35µA typ.) with low dropout voltage, making them ideal for battery applications. Output voltages are set at the factory and trimmed to 1.5% accuracy. l l l l l l These rugged devices have both thermal shutdown, and current fold-back to prevent device failure under the "worst" of operating conditions. In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground. An additional feature is a "Power Good" detector, which pulls low when the output is out of regulation. The AME8817 is stable with an output capacitance of 4.7µF or greater. l l l l l l Low Temperature Coefficient n Applications l l l l l n Functional Block Diagram IN Very Low Dropout Voltage Guaranteed 1.5A Output Accurate to within 1.5% 35µA Quiescent Current Typically Over-Temperature Shutdown Current Limiting Short Circuit Current Fold-back Noise Reduction Bypass Capacitor Power Good Output Power-Saving Shutdown Mode Space-Saving DDPAK-7 Package Instrumentation Portable Electronics Wireless Devices PC Peripherals Battery Powered Widgets OUT Overcurrent Shutdown n Typical Application Thermal Shutdown R1 IN OUT IN OUT AME8817 P G BYP (or ADJ) BYP AMP PG EN 1.24V C1 5V 1 µF C2 1nF GND EN C3 4.7 µF R2 GND 1 Analog Microelectronics, Inc. INARY PRELIM AME8817 1.5A CMOS LDO n Pin Configuration DDPAK-7 (TO-263) Top View AME8817AEDZXXX 1 2 3 4 5 6 7 AME8817BEDZXXX 1. 2. 3. 4. EN PG VIN GND 5. VOUT 6. VOUT 7. BYP 1 2 3 4 5 6 7 1. 2. 3. 4. EN PG VIN GND 5. VOUT 6. VOUT 7. ADJ n Ordering Information Output Voltage Package Type 1.50 AME8817AEDZ150 AME8817 AEDZ150 yyww 1.80 AME8817AEDZ180 AME8817 AEDZ180 yyww 2.50 AME8817AEDZ250 AME8817 AEDZ250 yyww 3.30 AME8817AEDZ330 AME8817 AEDZ330 yyww 4.75 AME8817AEDZ475 AME8817 AEDZ475 yyww 5.00 AME8817AEDZ500 AME8817 AEDZ500 yyww ADJ AME8817BEDZADJ AME8817 BEDZADJ yyww MARKING DDPAK-7 Please consult AME sales office or authorized Rep./Distributor for other output voltages, package types or pin configurations. 2 Analog Microelectronics, Inc. INARY PRELIM AME8817 1.5A CMOS LDO n Absolute Maximum Ratings: Parameter Maximum Unit 8 V Output Current PD / (VIN - VO) mA Output Voltage GND - 0.3 to VIN + 0.3 V Input Voltage ESD Classification B n Recommended operating Conditions: Parameter Rating Ambient Temperature Range Junction Temperature Unit -40 to +85 o C -40 to +125 o C n Thermal Information Parameter Thermal Resistance (θjc ) Internal Power Dissipation (PD ) Maximum 60 (∆ T = 100oC) Unit o C/W 2.7 W Maximum Junction Temperature 150 o C Maximum Lead Temperature ( 10 Sec) 300 o C Caution: Stress above the listed absolute rating may cause permanent damage to the device 3 Analog Microelectronics, Inc. INARY PRELIM AME8817 1.5A CMOS LDO n Electrical Specifications TA = 25 o C unles s otherwis e noted P a ra m e te r V IN O utput V oltage A c c urac y VO Dropout V oltage Te st Condition S ym bol Input V oltage V D R OPOU T M in Typ Note 1 IO = 1m A to 1.5A -1.5 1.5V < = V O N O M < = 2.0V IO = 1500m A V 1.5 % S ee c hart 2.8V < V O N O M < 3.8V 800 mV 600 IO V O > 1.2V 1500 Current Lim it ILIM V O > 1.2V 1500 S hort Circ uit Current ISC V O < 0.4V 750 1500 mA Quies c ent Current IQ IO = 0m A 35 50 µA Ground P in Current IG N D IO = 1m A to 1.5A Output Current Line Regulation Load Regulation RE G LIN E IO = 1m A V IN = V O + 1 to V O + 2 2000 -0.15 mA µA 0.15 % 4.0V > V O > = 2.0V -0.1 0.02 0.1 % V o > = 4.0V -0.4 0.2 0.4 % 0.2 1 IO = 1m A to 1500m A RE G LO AD mA 35 V O < 2.0V % Over Tem erature S hutdown OTS 150 o Over Tem erature Hy s teris is OTH 30 o V O Tem perature Coeffic ient TC 30 f= 1k Hz P ower S upply Rejec tion P ower S upply Rejec tion P S RR P S RR IO = 100m A IO = 100m A C O = 4.7 µ F C BY P = 0.01 µ F eN f= 10Hz to 100k Hz IO = 10m A ,C BY P = 0 µ F Output V oltage Nois e eN f= 10Hz to 100k Hz IO = 10m A ,C BY P = 0.01 µ F A DJ Input B ias Current IAD J A DJ Referenc e V oltage V R EF C C ppm / o C 50 f= 10k Hz 20 f= 100k Hz 15 f= 1k Hz 75 C O = 4.7 µ F Output V oltage Nois e E N Input Thres hold f= 10k Hz 55 f= 100k Hz 30 Co= 4.7 µ F 30 Co= 100 µ F 20 Co= 4.7 µ F 30 Co= 100 µ F 20 dB dB m V rm s m V rm s 1 1.223 1.242 mA 1.261 V V EH V I N = 2.7V to 7V 2.0 V in V V EL V I N = 2.7V to 7V 0 0.4 V IEH V EN = V I N , V I N = 2.7V to 7V 0.1 µA IEL V EN = V O V , V I N = 2.7V to 7V 0.5 µA S hutdown S upply Current ISD V I N = 5V , V O = 0V , V EN < V EL Output Under V oltage VUV Note1 Output Over V oltage V OV Note1 E N Input B ias Current 0.5 1 µA 85 % V O (N O M) 115 % V O (N O M) P G Leak age Current ILC V PG = 7V 1 mA P G V oltage Rating V PG V O in regulation 7 V P G V oltage Low V OL ISI N K = 500 µ A 0.4 V Note1:V I N (m in) = V O U T+ V D R O P O U T 4 Units 7 1000 2.0V < V O N O M < = 2.8V V O = V O N O M -2.0% Max Analog Microelectronics, Inc. AME8817 INARY PRELIM 1.5A CMOS LDO n Detailed Description The AME8817 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds 150oC, or the current exceeds 2.2A. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 110oC. The AME8817 behaves like a current source when the load reaches 2.2A. However, if the load impedance drops below 0.3 ohms, the current drops back to 600mA to prevent excessive power dissipation. Normal operation is restored when the load resistance exceeds 0.75 ohms. n External Capacitors All capacitors should be placed in close proximity to the pins. A "Quiet" ground termination is desirable. This can be achieved with a "Star" connection. n Enable When pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1µA. This pin behaves much like an electronic switch. n Power Good The AME8817 includes the Power Good feature. Normally, the PG pin is "Floating", however, when the output is not within ±15% of the specified voltage, it pulls low. This can occur under the following conditions: 1) Input Voltage too low. 2) During Over-Temperature. 3) During Over-Current. 4) If output is pulled up. The AME8817 is stable with an output capacitor to ground of 4.7µF or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1µF ceramic capacitor with a 10µF Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1µF to have a beneficial effect. A third capacitor can be connected between the BYPASS pin and GND. This capacitor can be a low cost Polyester Film variety between the value of 0.001 ~ 0.01µF. A larger capacitor improves the AC ripple rejection, but also makes the output come up slowly. This "Soft" turn-on is desirable in some applications to limit turn-on surges. 5 Analog Microelectronics, Inc. INARY PRELIM AME8817 1.5A CMOS LDO Dropout Voltage vs. I LOAD 1.2 I L O A D =1.5A 1.5 1 0.8 Dropout Voltage (V) Dropout Voltage (V) Dropout Voltage vs. V OUT 1 1.8 0.8 2.0 0.6 2.1 0.4 2.8 3.3 0.2 0.6 I L O A D =1.0A 0.4 I L O A D =0.5A 0.2 0 0 0 0.3 0.6 0.9 1.2 1.5 0 1.8 2 4 I LOAD (A) Ground Current vs. Temperature 50 I O U T = 1.8mA V O U T = 1.8V V I N = 5V 37 45 µA) Ground Current (µ µA) Ground Current (µ 38 36 35 34 33 32 31 40 35 I O U T = 140mA V O U T = 1.5V 30 25 20 15 30 10 0 50 100 150 Temperature ( O C) Ground Current vs. Load Current 38 37.5 V I N = 2.5V V O U T = 1.5V 37 36.5 36 35.5 35 34.5 0 0.25 0.5 0.75 2 3 4 5 V IN (V) 38.5 µA) Ground Current (µ 8 Ground Current vs. V IN 39 1 Load Current (mA) 6 6 V O U T (V) 1.25 1.5 6 7 8 Analog Microelectronics, Inc. INARY PRELIM AME8817 1.5A CMOS LDO Load Step 40mA to 1.5A ILOAD 1A/DIV VOUT (50mV/DIV) Transient Line Response 0A C IN = 4.7µF C O U T = 4.7µF V IN = 4.0V V O U T = 1.8V VOUT 10mV/DIV VIN (2V/DIV) C IN = 4.7µF C O U T = 4.7µF T R = T F = 1µS VOUT = 1.5V 0V Time (20 µS/DIV) Time 500 µS/DIV Current Limit Vs. V IN Current Limit Response 3 2.8 0V ILOAD 1A/DIV C I N = 4.7µF C O U T = 4.7µF V O U T = 1.8V 2.6 IL I M IS C Current Limit (A) VOUT 1V/DIV V I N = 5V C I N = 4.7µF C O U T = 4.7µF 2.4 2.2 2 1.8 1.6 1.4 0A 1.2 1 Time 1mS/DIV 2 3 4 5 6 7 8 V IN (V) Short Circuit Current VS. V IN Overtemperature Shutdown IOUT 1A/DIV 1.4 C I N = 4.7µF C O U T = 4.7µF 1.2 1 0.8 VOUT 1V/DIV Short Circuit Current (A) 1.6 0.6 0.4 0.2 0A V I N = 4V C I N = 4.7µF C O U T = 4.7µF 0V 0 2 3 4 5 V IN (V) 6 7 8 Time 100mS/DIV 7 Analog Microelectronics, Inc. INARY PRELIM AME8817 1.5A CMOS LDO Stability vs. ESR vs I LOAD 10000 Stability vs. ESR vs I LOAD 10000 Unstable Region Unstable Region 1000 1000 C L =5 µF 10 1 Stable Region 0.1 0 250 Untested Region 500 750 1000 1250 1 Stable Region 1500 Stability vs. ESR vs I LOAD Unstable Region 100 C L =10µF 10 1 Stable Region 0.1 0.01 Untested Region 0.001 0 250 500 750 1000 ILOAD (mA) 0 250 500 750 1000 ILOAD (mA) 10000 1000 Untested Region 0.01 ILOAD (mA) ESR (Ω Ω) 10 0.1 0.01 8 C L =2 µF 100 Ω) ESR (Ω ESR (Ω Ω) 100 1250 1500 1250 1500 Analog Microelectronics, Inc. AME8817 INARY PRELIM 1.5A CMOS LDO n Package Dimension TO-263 (DDPAK-7) SYMBOLS A B C D E G H K L M N P R S W MILLIMETERS MIN MAX 10.05 10.31 8.28 8.53 4.31 4.57 0.66 0.91 1.14 1.40 1.27 ref 14.73 15.75 1.40 1.68 0.00 0.25 2.49 2.74 0.43 0.58 2.29 2.79 o 8? 0 2.41 2.67 0.25 INCHES MIN MAX 0.396 0.406 0.326 0.336 0.170 0.180 0.026 0.036 0.045 0.055 0.050 ref 0.580 0.620 0.000 0.066 0.055 0.010 0.000 0.108 0.098 0.023 0.017 0.110 o 0 8? 0.095 0.105 0.01 9 www.analogmicro.com E-Mail: [email protected] Life Support Policy: These products of Analog Microelectronics, Inc. are not authorized for use as critical components in lifesupport devices or systems, without the express written approval of the president of Analog Microelectronics, Inc. Analog Microelectronics, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. Analog Microelectronics, Inc. , August 2001 Document: 2013-doc-006-0806 Corporate Headquarters Asia Pacific Headquarters Analog Microelectronics, Inc. AME, Inc. 3100 De La Cruz Blvd. Suite 201 Santa Clara, CA. 95054-2046 2F, 187 Kang-Chien Road, Nei-Hu Dist. Taipei 114, Taiwan, R.O.C. Tel : (408) 988-2388 Fax: (408) 988-2489 Tel : 886 2 2627-8687 Fax : 886 2 2659-2989