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Preliminary Datasheet 150mA RF ULDO REGULATOR General Description
The AP2201 is a 150mA output current fixed voltage regulator designed to provide very low noise (45Vrms at 80Hz-100KHz), ultra low dropout voltage (typically 165mV at 150mA), very low quiescent current (1A maximum) and excellent power supply ripple rejection (PSRR 75dB at 100Hz) in battery powered applications, such as handsets and PDAs and in noise sensitive applications, such as RF electronics. The AP2201 also features individual logic compatible enable/shutdown control inputs, a low power shutdown mode for extended battery life, over current protection, over temperature protection, as well as reversed-battery protection. The output capacitor of 1.0F minimum and 2.2F minimum near its pin are recommended when CBYP is not used and when CBYP is 470pF respectively. The output capacitor should have 5 or less ESR, tantalum or aluminium electrolytic capacitors are adequate. Bypass capacitor is connected to the internal voltage reference to quiet noise. Its recommended value is from 470pF to 1nF. If output noise is not a major concern and rapid turn-on is necessary, omit CBYP and leave BYP open. The AP2201 has 2.6V, 2.8V and 3.0V versions now. The AP2201 is available in space saving 5-pin SOT23-5 package.
AP2201 Features
* * * * * * * * * * * * * Up to 150mA Regulator Output Low Quiescent Current Low Dropout Voltage: VD=165mV at 150mA High Precision Output Voltage: 1% Output Noise: 45Vrms at 80Hz-100KHz Good Ripple Rejection Ability: 75dB at 100Hz and IOUT=100A Tight Load and Line Regulation Low Temperature Coefficient Over Current Protection Thermal Protection Reverse-battery Protection Zero Off-mode Current Logic-controlled Enable
Applications
* * * * * * * Cellular Phones Cordless Phones Digital Still Cameras Wireless Communicators PDAs / Palmtops PC Mother Board Consumer Electronics
VIN=3.8V VIN CIN 1.0F
AP2201-2.8
VIN EN GND BYP CBYP 470pF VOUT
VOUT=2.8V +
VOUT
COUT 2.2F tantalum
SOT-23-5
Figure 1. Typical Application of AP2201
Figure 2. Package Type of AP2201
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Pin Configuration
K Package (SOT-23-5)
AP2201
EN GND BYP
1 2 3
5
VIN
4
VOUT
Figure 3. Pin Configuration of AP2201 (Top View)
Pin Description
Pin Number 1 2 3 4 5 Pin Name EN GND BYP VOUT VIN Logic high enable input. Ground. Bypass capacitor for low noise operation. Regulated output voltage. Input voltage. Function
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Functional Block Diagram AP2201
VIN
5
4
VOUT
BYP
3
+ EN
1
Current Limit Thermal Shutdown Bandgap Ref.
2
GND
Figure 4. Functional Block Diagram of AP2201
Ordering Information
AP2201
E1: Lead Free Blank: Tin Lead TR: Tape and Reel
Circuit Type
Package K: SOT-23-5
2.6: Fixed Output 2.6V 2.8: Fixed Output 2.8V 3.0: Fixed Output 3.0V
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Ordering Information (Continued)
Package Temperature Range Part Number Tin Lead AP2201K-2.6TR SOT-23-5 -40 to 125oC AP2201K-2.8TR AP2201K-3.0TR Lead Free AP2201K-2.6TRE1 AP2201K-2.8TRE1 AP2201K-3.0TRE1 Marking ID Packing Type Tin Lead K1E K1G K1I Lead Free E1E E1G E1I Tape & Reel Tape & Reel Tape & Reel
AP2201
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Absolute Maximum Ratings (Note 1)
Parameter Supply Input Voltage Enable Input Voltage Power Dissipation Lead Temperature (Soldering, 5sec) Storage Temperature ESD (Machine Model) Thermal Resistance JA Symbol VIN VEN PD TLEAD TSTG Value 15 15 Internally Limited 260 -65 to 150 200 (Note 2) Unit V V W
oC oC
V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Note 2: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(max), the junction-to-ambient thermal resistance, JA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD(max)=(TJ(max) TA)/JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
Recommended Operating Conditions
Parameter Supply Input Voltage Enable Input Voltage Operating Junction Temperature Symbol VIN VEN TJ Min 2.5 0 -40 Max 13.2 13.2 125 Unit V V
oC
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Electrical Characteristics
VIN=VOUT +1V, IOUT = 100A, CL = 2.2F, VEN 2.0V, TJ = 25oC, Bold typeface applies over -40oCAP2201
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Electrical Characteristics (Continued)
VIN=VOUT +1V, IOUT = 100A, CL = 2.2F, VEN 2.0V, TJ = 25oC, Bold typeface applies over -40oCnV / Hz
AP2201
Unit A
V
IIL IIH
A
Logic-High
Note 3: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Note 4: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Note 6: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the load current plus the ground pin current.
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Typical Performance Characteristics AP2201
2.900 2.875 2.850
350
AZ2201-2.8V
300
IOUT=50mA IOUT=100mA IOUT=150mA CIN=1.0F, CL=2.2F, CBYP=1nF
Output Voltage (V)
2.825 2.800 2.775 2.750 2.725 2.700 -60
Dropout Voltage (mV)
-40 -20 0 20 40 60
o
250
200
150
100
50
80
100
120
140
0 -60
-40
-20
0
20
40
60
o
80
100
120
140
Junction Temperature ( C)
Junction Temperature ( C)
Figure 5. Output Voltage vs. Junction Temperature
Figure 6. Dropout Voltage vs. Junction Temperature
6 5 4
5000
4000
AP2201-2.8V IOUT=50mA IOUT=100mA IOUT=150mA VIN=3.8V,VEN=2.0V,CIN=1.0F, CL=2.2F,CBYP=1nF
Ground Pin Current (mA)
3 2 1 0 -1 -2 -3 -4 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Ground Pin Current (A)
3000
2000
1000
0
-1000
-2000 -60
-40
-20
0
20
40
60
o
80
100
120
140
Output Current (mA)
Junction Temperature ( C)
Figure 7. Ground Pin Current vs. Output Current
Figure 8. Ground Pin Current vs. Junction Temperature
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Typical Performance Characteristics (Continued) AP2201
20 18 16
2.0
AP2201-2.8V
VEN=1.8V VEN=2.0V VEN=3.0V
1.9 1.8 1.7
AP2201-2.8V VEN=on VEN=off CIN=1.0F,CL=2.2F,CBYP=1nF VIN=3.8V,IOUT=5mA
Enable Current (A)
14 12 10 8 6 4 2 0 -60
Enable Voltage (V)
VEN=4.0V VIN=3.8V, CIN=1.0F, CL=2.2F, IOUT=100A, CBYP=1nF
1.6 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7
-40
-20
0
20
40
60
80
o
100
120
140
0.6 -60
-40
-20
0
20
40
60
80
o
100
120
140
Junction Temperature ( C)
Junction Temperature ( C)
Figure 9. Enable Current vs. Junction Temperature
Figure 10. Enable Voltage vs. Junction Temperature
200
150
Noise (Vrms)
100
50
0 10
100
1000
10000
Output Voltage
Output Current
AP2201-2.8V
Bypass Capacitor (pF)
Time (s)
Figure 11. Noise vs. Bypass Capacitor
Figure 12. Load Transient (Conditions: VIN=3.8V, CBYP=680pF, VEN=2V, IOUT=5mA to 50mA, CL=2.2F)
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Typical Performance Characteristics (Continued) AP2201
Output Voltage
Output Voltage
Enable Voltage
AP2201-2.8V Input Voltage
AP2201-2.8V
Time (s) Time (s)
Figure 13. Line Transient (Conditions: VIN=3.8V to 4.8V, VEN=2V, IOUT=100A CBYP=680pF, CL=10F)
Figure 14. VEN(on) vs. VO (Conditions: VEN=0V to 2V, VIN=3.8V, IOUT=30mA, CBYP=open, CL=2.2F)
0 -10 -20 -30
AP2201-2.8V
PSRR (dB)
-40 -50 -60 -70 -80 -90 -100 100
1k
10k
100k
1M
10M
Frequency (Hz)
Figure 15. PSRR vs. Frequency ( Conditions: CIN =1.0F, CL = 2.2F, CBYP= open, VIN=3.8V, IOUT=10mA, VEN=2V)
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Application Information
External Capacitors The AP2201 requires external capacitors for regulator stability. These capacitors must be correctly selected for good performance. Input Capacitor If there is more than 10 inches of wire between the input and the AC filter or if a battery is used as the input, at least a 1F capacitor should be placed from IN to GND. Output Capacitor It is required to prevent oscillation. 1.0F minimum is recommended when CBYP is not used. 2.2F minimum is recommended when CBYP is 470pF. The output capacitor may be increased without limit for large values to improve transient response. The output capacitor should have an ESR of about 5 or less. In most cases, tantalum or aluminium electrolytic capacitors are adequate. Noise Bypass Capacitor Bypass capacitor is connected to the internal voltage reference. A 680pF capacitor connected from BYP to GND make this reference quiet, resulting in a significant reduction in output noise. When using CBYP, output capacitors of 2.2F or greater are required for better stability. The start-up speed of the AP2201 is inversely proportional to the value of reference bypass capacitor. In some cases if output noise is not a major concern and rapid turn-on is necessary, omit CBYP and leave BYP open.
AP2201
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 150mA RF ULDO REGULATOR Mechanical Dimensions SOT-23-5 Unit: mm(inch) AP2201
2.820(0.111) 3.020(0.119)
0.100(0.004) 0.200(0.008)
2.650(0.104)
2.950(0.116)
1.500(0.059) 1.700(0.067)
0.200(0.008)
0.700(0.028) REF
0.950(0.037) TYP
0.300(0.012) 0.400(0.016) 1.800(0.071) 2.000(0.079)
0.300(0.012) 0.600(0.024)
0 8
1.050(0.041)
1.250(0.049)
0.000(0.000) 0.100(0.004)
1.050(0.041) 1.150(0.045)
Jun. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
800 Yi Shan Road, Shanghai 200233, PRC Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
Advanced Analog Circuits (Shanghai) Corporation
8F, B Zone, 900 Yi Shan Road, Shanghai 200233, PRC Tel: +86-21-6495 9539, Fax: +86-21-6485 9673
BCD Semiconductor (Taiwan) Company Limited
4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656-2808, Fax: +886-2-2656-2806
IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others.

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