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| MP8801 Low Dropout 150mA Linear Regulator The Future of Analog IC Technology DESCRIPTION The MP8801 is a low-noise, low-dropout linear regulator. It operates from a 2.7V to 6.5V input voltage and regulates the output voltage with 2% accuracy at 2.5V, 2.85V or 3.3V. The internally set output voltage may be overridden with an external resistor divider from 1.25V to 5V. The MP8801 can supply up to 150mA of load current. The MP8801 features thermal overload protection and is available in a 5-pin TSOT23-5 package. * * * * * * * * * * * * * FEATURES Low 100mV Dropout at 100mA Output 2% Accurate Output Voltage Fixed Output Voltage Options of 2.5V, 2.85V or 3.3V Adjustable Output Voltage from 1.25V to 5V using an External Resistor Divider Up to 6.5V Input Voltage High PSRR o 70dB at 1KHz o 30dB at 1MHz Better Than 0.001%/mA Load Regulation Stable With Low-ESR Output Capacitor Low 125A Ground Current Internal Thermal Protection 802.11 PC Cards Mobile Handset PLL Power Audio Codec Power FIXED VOLTAGE PART NUMBERS Part Number MP8801DJ-2.5 MP8801DJ-2.85 MP8801DJ-3.3 Output Voltage 2.5V 2.85V 3.3V APPLICATIONS EVALUATION BOARD REFERENCE Board Number EV8801DJ-00A * Output* 2.85V Dimensions 2.0"X x 2.0"Y x 0.4"Z "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc. Default output voltage adjustable from 1.25V to 5.0V using an external resistor divider. TYPICAL APPLICATION VDROPOUT vs ILOAD VIN 2.7V to 6.5V 1 IN OUT 5 160 OUTPUT 1.5V to 5V 140 MP8801DJ-X.X VIN 3 EN GND 2 FB 4 R1 VDROPOUT (mV) 120 100 80 60 40 20 0 0 20 40 60 80 100 120 140 160 ILOAD (mA) EN (Pin3) may be connected to IN (Pin 1) directly The sum of R1 and R2 R2 should not exceed 100k MP8801 Rev. 1.7 10/3/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 1 MP8801 - LOW DROPOUT, 150mA LINEAR REGULATOR PACKAGE REFERENCE TOP VIEW IN GND EN 1 2 3 5 OUT ABSOLUTE MAXIMUM RATINGS (1) IN Supply Voltage....................... -0.3V to +7.0V FB Voltage.........................-0.3V to VOUT + 0.3V All Other Pins................................. -0.3V to +6V Junction Temperature...............................150C Lead Temperature ....................................260C Storage Temperature .............-65C to +150C MARKING Recommended Operating Conditions 4 FB (2) Part Number** MP8801DJ-2.5 MP8801DJ-2.85 MP8801DJ-3.3 Package TSOT23-5 TSOT23-5 TSOT23-5 Temp -40C to +85C -40C to +85C -40C to +85C Input Voltage .................................. 2.7V to 6.5V Output Voltage................................. 1.25V to 5V Load Current........................... 150mA Maximum Operating Temperature .............-40C to +85C Thermal Resistance (3) TSOT23-5.............................. 220 .... 110.. C/W Notes: 1) Exceeding these ratings may damage the device. 2) The device is not guaranteed to function outside of its operating conditions. 3) Measured on approximately 1" square of 1 oz copper. JA JC ** For Tape & Reel, add suffix -Z (eg. MP8801DJ-2.85-Z) For RoHS Compliant Packaging, add suffix -LF (eg. MP8801DJ-2.85-LF-Z) ELECTRICAL CHARACTERISTICS VIN = 5V, TA = +25C, unless otherwise noted. Parameter Operating Voltage Output Voltage Accuracy Ground Pin Current Shutdown Current FB Regulation Voltage Dropout Voltage (5) Line Regulation Load Regulation PSRR Output Voltage Noise EN Input High Voltage EN Input Low Voltage EN Input Bias Current Thermal Protection (4) Thermal Protection Hysteresis (4) Symbol Condition IOUT = 1mA IOUT = 1mA, VOUT = 1.5V to 5V IOUT = 1mA-150mA VEN = 0V, VIN = 5V -40C TA 85C VOUT = 3V IOUT = 150mA VOUT = 4V IOUT = 1mA, VIN = (VOUT + 0.5V) to 6.5V (6) IOUT = 1mA to 150mA, VIN = VOUT + 0.5V (6) VIN > VOUT +0.5V, C3 = 2.2F, VIN(AC) = 100mV, f = 1kHz (4) VIN > VOUT +0.5V, C3 = 2.2F, VIN(AC) = 100mV, f = 1MHz (4) f = 1kHz, C2 > 0.1F, IOUT = 1mA (4) VEN = 0V, 5V Max 6.5 1.0 2.0 125 150 0.1 1 1.197 1.222 1.246 1.194 1.222 1.249 150 125 0.005 0.001 70 30 300 1.5 0.4 0.01 155 30 1 0.08 0.02 Min 2.7 Typ (4) Units V % A A V mV %/V %/mA dB dB nV/Hz V V A C C Notes: 4) Parameter is guaranteed by design, not production tested. 5) Dropout Voltage is defined as the input to output differential when the output voltage drops 1% below its normal value. 6) VIN = 2.7V for VOUT = 1.25V to 2.2V MP8801 Rev. 1.7 10/3/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 2 MP8801 - LOW DROPOUT, 150mA LINEAR REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS VIN = 4.5V, VOUT = 2.85V, C1 = 1F, C2 = 0.1F, C3 = 2.2F, TA = +25C unless otherwise noted. IGND vs VIN 135 130 125 120 115 110 105 ILOAD = 1mA ILOAD = 150mA 135 130 125 120 115 110 105 VIN = 2.7V 2.845 0 50 100 ILOAD (mA) 150 2.84 3 4 5 VIN (V) 6 7 VIN = 6.5V VIN = 5.0V VOUT (V) IGND vs ILOAD 2.87 2.865 2.86 VOUT vs. VIN ILOAD = 1mA 2.855 2.85 ILOAD = 150mA 2 3 4 5 VIN (V) 6 7 80 70 60 PSRR (dB) PSRR vs Frequency Output Noise Spectral Density Output Noise Spectral Density 50 40 30 20 10 0.01 0.1 1 10 100 FREQUENCY (KHz) 1000 128 FREQUENCY (Hz) x: 1.024kHz y: 240.013n IOUT = 150mA 102.4K 128 FREQUENCY (Hz) x: 1.024kHz y: 287.004n IOUT = 1mA 102.4K VDROPOUT vs ILOAD 160 140 VDROPOUT (mV) Load-Transient Response (Circuit in Figure 3) 4V ILOAD (50mA/div.) 3V Line-Transient Response (Circuit in Figure 3) 120 100 80 60 40 20 0 0 VIN (1V/div.) VOUT (20mV/div.) 2.85V VOUT (10mV/div.) 20 40 60 80 100 120 140 160 ILOAD (mA) MP8801 Rev. 1.7 10/3/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 3 MP8801 - LOW DROPOUT, 150mA LINEAR REGULATOR PIN FUNCTIONS Pin # 1 2 3 4 5 Name IN GND EN FB OUT Description Power Source Input. IN supplies the internal power to the MP8801 and is the source of the pass transistor. Bypass IN to GND with a 1F or greater capacitor. Ground. Enable Input. Drive EN high to turn on the MP8801; low to turn it off. For automatic startup, connect EN to IN. Feedback Input. Connect a resistive voltage divider from OUT to FB to set the output voltage. The OUT feedback threshold is 1.222V. Regulator Output. OUT is the output of the linear regulator. Bypass OUT to GND with a 1F or greater capacitor. OPERATION The MP8801 is a low-current, low-noise, high-PSRR, low-dropout linear regulator. It is intended for use in devices that require very low noise power supplies and high-PSRR such as PLL VCO supplies for mobile handsets and 802.11 PC Cards, as well as audio codecs and microphones. The MP8801 uses a PMOS pass IN VIN 1 INTERNAL RESISTOR DIVIDER element and features internal thermal shutdown. The normally fixed output MP8801 may be converted to an adjustable output device by applying a resistor divider network as shown in Figure 2. An optional feed-forward capacitor, CBYP, may be added for an improved transient response. OUT 5 CBYP 4 VOUT + -EN VEN 3 GND BANDGAP REFERENCE FB C3 2 Figure 1--Ultra-Low-Noise Fixed Output Regulator EXTERNAL RESISTOR OUT DIVIDER VIN 1 5 FB + -4 BANDGAP REFERENCE R2 COUT R1 CBYP VOUT VEN 3 GND 2 Figure 2--Ultra-Low-Noise Adjustable Regulator: VOUT = VFB(1+(R1/R2)) MP8801 Rev. 1.7 10/3/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 4 MP8801 - LOW DROPOUT, 150mA LINEAR REGULATOR APPLICATION INFORMATION SETTING THE OUTPUT VOLTAGE The fixed output voltage of the MP8801DJ is set to 2.5V, 2.85V or 3.3V, depending on the internal resistor divider (Figure 1). You can also adjust the output voltage by using an external resistor divider (R1 and R2 in Figure 2). However, the sum of R1 and R2 should not exceed 100k in order to minimize the impact of the internal resistor divider. For an accurate output-voltage setting, use 10k (1%) for the low-side resistor R2 of the voltage divider, while the high-side resistor R1 can be determined by the equation: V - VFB R1 = R2 x OUT VFB INPUT CAPACITOR SELECTION For proper operation, place a ceramic capacitor (C1) between 1F and 10F of dielectric type X5R or X7R between the input pin and ground. Larger values in this range will help improve line transient response at the drawback of increased size. OUTPUT CAPACITOR SELECTION For stable operation, use a ceramic capacitor (C3) of type X5R or X7R between 1F and 10F. Larger values in this range will help improve load transient response and reduce noise with the drawback of increased size. Output capacitors of other dielectric types may be used, but are not recommended as their capacitance can deviate greatly from their rated value over temperature. To improve load transient response, add a small ceramic (X5R, X7R or Y5V dielectric) 100nF feed forward capacitor in parallel with R1. The feed forward capacitor is not required for stable operation. Where VFB is the OUT feedback threshold voltage equal to 1.222V. Example: For 2.5V Output R1 = 2.5 V - 1.222 V = 10.41k 1.222 V 10k You can select a standard 10.5k (1%) resistor for R1. The following table lists the selected R1 values for some typical output voltages: Table 1--Adjustable Output Voltage R1 Values VOUT (V) 1.25 1.5 1.8 2 2.5 2.8 3 3.3 4 5 R1 () 232 2.26k 4.75k 6.34k 10.5k 13k 14.7k 16.9k 22.6k 30.9k 10k R2 () In Figures 3 and 4, C2 is added for an improved transient response. MP8801 Rev. 1.7 10/3/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 5 MP8801 - LOW DROPOUT, 150mA LINEAR REGULATOR TYPICAL APPLICATION CIRCUIT VIN 2.7V to 6.5V 1 IN OUT 5 OUTPUT 2.85V MP8801DJ-2.85 VIN 3 EN GND 2 FB 4 C2 100nF Figure 3--Typical Application Circuit (Fixed) VIN 2.7V to 6.5V 1 IN OUT 5 OUTPUT 2V MP8801DJ-X.X VIN 3 EN GND 2 FB 4 Figure 4--Typical Application Circuit (Adjustable) MP8801 Rev. 1.7 10/3/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 6 MP8801 - LOW DROPOUT, 150mA LINEAR REGULATOR PACKAGE INFORMATION TSOT23-5 2.80 3.00 5 4 1.20 TYP 0.60 TYP 0.95 BSC 1.50 1.70 2.60 3.00 2.60 TYP 1 3 TOP VIEW RECOMMENDED LAND PATTERN 0.84 0.90 1.00 MAX SEATING PLANE 0.30 0.50 0.95 BSC 0.00 0.10 SEE DETAIL "A" 0.09 0.20 FRONT VIEW SIDE VIEW NOTE: GAUGE PLANE 0.25 BSC 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5) DRAWING CONFORMS TO JEDEC MO-193, VARIATION AA. 6) DRAWING IS NOT TO SCALE. 0o-8o 0.30 0.50 DETAIL A NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP8801 Rev. 1.7 10/3/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 7 |
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