MP8801 Low Dropout 150mA Linear Regulator The Future of Analog IC Technology DESCRIPTION FEATURES 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. FIXED VOLTAGE PART NUMBERS Part Number Output Voltage MP8801DJ–2.5 MP8801DJ–2.85 MP8801DJ–3.3 2.5V 2.85V 3.3V • • • • • • • 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 125µA Ground Current Internal Thermal Protection APPLICATIONS EVALUATION BOARD REFERENCE * • • • Board Number Output* Dimensions EV8801DJ-00A 2.85V 2.0”X x 2.0”Y x 0.4”Z • • • 802.11 PC Cards Mobile Handset PLL Power Audio Codec Power “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 VIN 160 1 IN OUT 5 VIN EN GND 2 EN (Pin3) may be connected to IN (Pin 1) directly FB 140 1.5V to 5V R1 MP8801DJ-X.X 3 OUTPUT 4 The sum of R1 and R2 R2 should not exceed 100k VDROPOUT (mV) 2.7V to 6.5V VDROPOUT vs ILOAD 120 100 80 60 40 20 0 MP8801 Rev. 1.7 10/3/2006 0 20 40 60 80 100 120 140 160 ILOAD (mA) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 1 MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR ABSOLUTE MAXIMUM RATINGS (1) PACKAGE REFERENCE 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...............................150°C Lead Temperature ....................................260°C Storage Temperature .............–65°C to +150°C TOP VIEW 1 GND 2 EN MARKING IN 3 5 OUT Recommended Operating Conditions 4 FB Part Number** Package Temp MP8801DJ–2.5 TSOT23-5 –40°C to +85°C MP8801DJ–2.85 TSOT23-5 –40°C to +85°C MP8801DJ–3.3 TSOT23-5 –40°C to +85°C ** For Tape & Reel, add suffix –Z (eg. MP8801DJ–2.85–Z) For RoHS Compliant Packaging, add suffix –LF (eg. MP8801DJ–2.85–LF–Z) (2) Input Voltage .................................. 2.7V to 6.5V Output Voltage................................. 1.25V to 5V Load Current........................... 150mA Maximum Operating Temperature .............–40°C to +85°C Thermal Resistance (3) θJA θJC 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. ELECTRICAL CHARACTERISTICS VIN = 5V, TA = +25°C, 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 –40°C ≤ TA ≤ 85°C 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 = 2.2µF, VIN(AC) = 100mV, f = 1kHz (4) VIN > VOUT +0.5V, C3 = 2.2µF, VIN(AC) = 100mV, f = 1MHz (4) f = 1kHz, C2 > 0.1µF, IOUT = 1mA (4) Min 2.7 Typ (4) 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 Units V % µA µA 0.005 0.08 %/V 0.001 0.02 %/mA mV 70 dB 30 dB 300 1.5 0.4 VEN = 0V, 5V V 0.01 155 30 1 nV/√Hz V V µA °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. © 2006 MPS. All Rights Reserved. 2 MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS VIN = 4.5V, VOUT = 2.85V, C1 = 1µF, C2 = 0.1µF, C3 = 2.2µF, TA = +25°C unless otherwise noted. IGND vs VIN IGND vs ILOAD 135 135 125 125 120 120 ILOAD = 1mA 115 80 3 4 5 VIN (V) 6 105 7 2.86 ILOAD = 1mA 2.855 ILOAD = 150mA 2.85 VIN = 2.7V 110 2 VOUT vs. VIN 2.865 VIN = 5.0V 115 110 105 VIN = 6.5V 130 ILOAD = 150mA VOUT (V) 130 2.87 2.845 0 50 100 ILOAD (mA) 150 2.84 Output Noise Spectral Density PSRR vs Frequency 3 4 5 VIN (V) 6 7 Output Noise Spectral Density 70 PSRR (dB) 60 50 40 30 x: 1.024kHz y: 240.013n 20 10 0.01 0.1 1 10 100 FREQUENCY (KHz) 1000 x: 1.024kHz y: 287.004n IOUT = 150mA 128 102.4K 128 102.4K FREQUENCY (Hz) FREQUENCY (Hz) Load-Transient Response VDROPOUT vs ILOAD IOUT = 1mA Line-Transient Response (Circuit in Figure 3) (Circuit in Figure 3) VDROPOUT (mV) 160 140 4V 120 3V ILOAD (50mA/div.) 100 VIN (1V/div.) 80 VOUT (20mV/div.) 60 40 2.85V VOUT (10mV/div.) 20 0 0 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. © 2006 MPS. All Rights Reserved. 3 MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR PIN FUNCTIONS Pin # Name 1 IN 2 GND 3 EN 4 FB 5 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 1µF 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 1µF or greater capacitor. OPERATION 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. 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 OUT 1 5 VOUT INTERNAL RESISTOR DIVIDER CBYP 4 + -- FB BANDGAP REFERENCE C3 EN VEN 3 2 GND Figure 1—Ultra-Low-Noise Fixed Output Regulator EXTERNAL RESISTOR OUT DIVIDER VIN 1 5 VOUT FB + -- R1 4 BANDGAP REFERENCE R2 VEN CBYP COUT 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. © 2006 MPS. All Rights Reserved. 4 MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR APPLICATION INFORMATION SETTING THE OUTPUT VOLTAGE INPUT CAPACITOR SELECTION 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 100kΩ in order to minimize the impact of the internal resistor divider. For an accurate output-voltage setting, use 10kΩ (±1%) for the low-side resistor R2 of the voltage divider, while the high-side resistor R1 can be determined by the equation: For proper operation, place a ceramic capacitor (C1) between 1µF and 10µF 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. ⎛V − VFB R1 = R2 × ⎜⎜ OUT VFB ⎝ ⎞ ⎟⎟ ⎠ Where VFB is the OUT feedback threshold voltage equal to 1.222V. Example: For 2.5V Output R1 = 2.5 V − 1.222 V = 10.41kΩ ⎛ 1.222 V ⎞ ⎜ ⎟ ⎝ 10kΩ ⎠ OUTPUT CAPACITOR SELECTION For stable operation, use a ceramic capacitor (C3) of type X5R or X7R between 1µF and 10µF. 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. You can select a standard 10.5kΩ (±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) R1 (Ω) 1.25 232 1.5 2.26k 1.8 4.75k 2 6.34k 2.5 10.5k 2.8 13k 3 14.7k 3.3 16.9k 4 22.6k 5 30.9k R2 (Ω) 10k 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. © 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 2.85V C2 100nF MP8801DJ-2.85 3 VIN EN GND OUTPUT FB 4 2 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 FB 4 2 Figure 4—Typical Application Circuit (Adjustable) MP8801 Rev. 1.7 10/3/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 6 MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR PACKAGE INFORMATION TSOT23-5 0.95 BSC 0.60 TYP 2.80 3.00 5 4 1.20 TYP 1.50 1.70 1 2.60 TYP 2.60 3.00 3 TOP VIEW RECOMMENDED LAND PATTERN 0.84 0.90 1.00 MAX 0.09 0.20 SEATING PLANE 0.30 0.50 0.95 BSC 0.00 0.10 SEE DETAIL "A" FRONT VIEW SIDE VIEW NOTE: GAUGE PLANE 0.25 BSC 0.30 0.50 0o-8o DETAIL A 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. 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. © 2006 MPS. All Rights Reserved. 7