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MP8802
Low Dropout 250mA Linear Regulator
The Future of Analog IC Technology
DESCRIPTION
The MP8802 is a low-noise, low-dropout linear regulator. It operates from 2.7V to 6.5V input voltage, and regulates the output voltage with 2% accuracy at 2.5V, 2.85V, 3.3V, or from 1.25V to 5V. The MP8802 can supply up to 250mA of load current. The MP8802 features thermal overload protection. It is available in a 5-pin TSOT23-5 package.
* * * * * * * * * * * * *
FEATURES
Low 250mV Dropout at 250mA Output 2% Accurate Output Voltage Fixed Output Voltage Options of 2.5V, 2.85V or 3.3V Adjustable Output Voltage Option 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 MP8802DJ-2.5 MP8802DJ-2.85 MP8802DJ-3.3 Output Voltage 2.5V 2.85V 3.3V
APPLICATIONS
EVALUATION BOARD REFERENCE
Board Number EV8802DJ-00A * Output* 2.85V Dimensions 2.0"X x 2.0"Y x 0.4"Z
Default output voltage adjustable from 1.25V to 5.0V using an external resistor divider.
"MPS" and "The Future of Analog IC Technology" are Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
2.7V to 6.5V 1 IN OUT 5
300
OUTPUT R1
4 The sum of R1 and R2 R2 should not exceed 100k 1.25V to 5V
VDROPOUT vs ILOAD
250
VDROPOUT (mV)
MP8802_TAC_S01
MP8802DJ-X.X VIN
3 EN GND FB
200 150 100 50 0 0 50 100 150 200 250 300 ILOAD (mA)
MP8802_EC01
2 EN (Pin3) may be connected to IN (Pin 1) directly
MP8802 Rev. 1.3 3/6/2006
www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved.
1
MP8802 - LOW DROPOUT, 250mA 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)
MP8802_PD01-TSOT23-5
Input Voltage .................................. 2.7V to 6.5V Output Voltage................................. 1.25V to 5V Load Current........................... 250mA Maximum Operating Temperature .............-40C to +85C
Part Number** MP8802DJ-2.5 MP8802DJ-2.85 MP8802DJ-3.3
Package TSOT23-5
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. MP8802DJ-2.85-Z)
For Lead Free, add suffix -LF (eg. MP8802DJ-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 Thermal Protection Hysteresis Symbol Condition IOUT = 1mA IOUT = 1mA, VOUT = 1.25V to 5V IOUT = 1mA-250mA VEN = 0V, VIN = 5V -40C TA +85C VOUT = 3V IOUT = 250mA VOUT = 4V IOUT = 1mA, VIN = (VOUT + 0.5V) to 6.5V (6) IOUT = 1mA to 250mA, VIN = VOUT + 0.5V (6) VIN > VOUT +0.5V, COUT = 2.2F, VIN(AC) = 100mV, f = 1kHz VIN > VOUT + 0.5V, COUT = 2.2F, VIN(AC) = 100mV, f = 1MHz f = 1kHz, CFB > 0.1F, IOUT = 1mA VEN = 0V, 5V Min 2.7 2.0 1.197 1.194 Typ (4) 1.0 125 0.1 1.222 1.222 230 190 0.005 0.001 70 30 300 1.5 0.4 0.01 155 30 1 Max 6.5 2.0 155 1 1.246 1.249 Units V % A A V mV 0.08 0.02 %/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
MP8802 Rev. 1.3 3/6/2006
www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved.
2
MP8802 - LOW DROPOUT, 250mA LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 4.5V, VOUT = 2.85V, C1 = 1F, C2 = 0.1F, C3 = 2.2F, TA = +25C unless otherwise noted.
180 170 160 150 140 130 120 110 100 2 3 4 5 VIN (V) 6 7 100 0 50 100 150 ILOAD (mA) 200 250 ILOAD = 1mA 140 120 VIN = 5.0V ILOAD = 250mA 180
IGND vs VIN
200
IGND vs ILOAD
2.87 2.865
VOUT vs. VIN
VOUT (V)
160
VIN = 6.5V
2.86 2.855 2.85 2.845 2.84 3 ILOAD = 250mA ILOAD = 1mA
4
5 VIN (V)
6
7
MP8802-TPC03
MP8802-TPC01
MP8802-TPC02
PSRR vs Frequency
80 70 60
Output Noise Spectral Density
Output Noise Spectral Density
PSRR (dB)
50 40 30 20 10 0.01 0.1 1 10 100 FREQUENCY (KHz) 1000 128 FREQUENCY (Hz)
MP8802-TPC05
x: 1.024kHz y: 240.013n
IOUT = 250mA 102.4K 128
x: 1.024kHz y: 287.004n
IOUT = 1mA 102.4K
FREQUENCY (Hz)
MP8802-TPC06
MP8802-TPC04
VDROPOUT vs ILOAD
300 250
Load-Transient Response
(Circuit in Figure 4)
4V ILOAD (50mA/div.) 3V
Line-Transient Response
(Circuit in Figure 4)
VIN (1V/div.)
VDROPOUT (mV)
200 150 100 50 0 0 50
VOUT (20mV/div.)
2.85V
VOUT (10mV/div.)
100 150 200 250 300 ILOAD (mA)
MP8802_TPC07
MP8802-TPC08
MP8802-TPC09
MP8802 Rev. 1.3 3/6/2006
www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved.
3
MP8802 - LOW DROPOUT, 250mA 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 MP8802 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 MP8802, drive EN 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. 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 MP8802 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 MP8802 uses a PMOS pass element and features internal thermal shutdown. As shown in Figures 1 and 2, optional feedforward capacitor CBYP may be added between FB and OUT pins for an improved transient response.
OUT VIN
INTERNAL RESISTOR DIVIDER
VOUT CBYP FB COUT
+ --
BANDGAP REFERENCE
VEN GND
MP8802_F01_BD01
Figure 1--Ultra-Low-Noise Fixed Output Regulator
EXTERNAL RESISTOR OUT DIVIDER
VIN R1 + -CBYP
VOUT
BANDGAP REFERENCE
FB R2 COUT
VEN GND
MP8802_F02_BD02
Figure 2--Ultra-Low-Noise Adjustable Regulator: VOUT = VFB(1+(R1/R2))
MP8802 Rev. 1.3 3/6/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved.
4
MP8802 - LOW DROPOUT, 250mA LINEAR REGULATOR
APPLICATION INFORMATION
SETTING THE OUTPUT VOLTAGE
The fixed output voltage of the MP8802DJ 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 to minimize the impact of the internal resistor divider. For accurate outputvoltage setting, it is suggested to use 10k (1%) for the low-side resistor R2 of the voltage divider, the high side resistor R1 can be determined by the equation:
V - VFB R1 = R2 x OUT VFB
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
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
In Figures 3 and 4, C2 is added for an improved transient response.
MP8802 Rev. 1.3 3/6/2006
www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved.
5
MP8802 - LOW DROPOUT, 250mA LINEAR REGULATOR
TYPICAL APPLICATION CIRCUIT
VIN 2.7V to 6.5V
1 IN OUT 5
OUTPUT
2.85V
MP8802DJ-2.85 VIN
3 EN GND 2 FB 4
C2 100nF
MP8802_F03_TAC01
Figure 3--Typical Application Circuit (Fixed)
VIN 2.7V to 6.5V
1
IN
OUT
5
OUTPUT
2V
MP8802DJ-X.X VIN
3 EN GND 2 FB 4
C2 100nF
MP8802_F03_TAC01
Figure 4--Typical Application Circuit (Adjustable)
MP8802 Rev. 1.3 3/6/2006
www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved.
6
MP8802 - LOW DROPOUT, 250mA LINEAR REGULATOR
PACKAGE INFORMATION
TSOT23-5
2.90 BSC
3
0.950 TYP.
0.950 TYP.
10TYP. (2 plcs)
3
C L
1.60 BSC
2.80 BSC
0
0.25 BSC.
+ 4 - 0
0.400
0.10
0.300(Min) 0.500(Max) (5 PLCS)
Gauge Plane
C L
1.00 Max.
0.870.03
SEATING PLANE
0.00-0.10
10 TYP. (2 plcs)
0.127 TYP.
Dimensions are in millimeters
NOTE: 1. Dimensions and tolerances are as per ANSI Y14.5M, 1994. 2. Die is facing up for mold. Die is facing down for trim/form, ie. reverse trim/form. 3. Dimensions are exclusive of mold flash and gate burr. 4. The footlength measuring is based on the gauge plane method. 5. All specification comply to Jedec Spec MO193 Issue C.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. 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.
MP8802 Rev. 1.3 3/6/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved.
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