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Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n General Description
The AME8807 family of positive, linear regulators feature low quiescent current (30A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SO-8 package is attractive for "Pocket" and "Hand Held" applications. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" of operating conditions. The AME8807 is stable with an output capacitance of 2.2F or greater.
n Features
l l l l l l l l l l l
Very Low Dropout Voltage Guaranteed 600mA Output Accurate to within 1.5% 30A Quiescent Current Over-Temperature Shutdown Current Limiting Short Circuit Current Fold-back Power-Saving Shutdown Mode Space-Saving SO-8 Package User Adjustable Output Voltages Low Temperature Coefficient
n Applications
l l l l l l l
n Functional Block Diagram
IN
Overcurrent Shutdown
Instrumentation Portable Electronics Wireless Devices Cordless Phones PC Peripherals Battery Powered Widgets Electronic Scales
OUT
Thermal Shutdown
n Typical Application
IN C1
OUT EN IN AME8807 PG GND ADJ
EN
V ref x110%
OUT C2 R1 100p C3 2.2F R2
PG
AMP ADJ
5V
1F
V ref x90%
V ref = 1 . 2 1 5 V
GND
VOUT = 1.215 ( R1/R2 +1 ) C2 is unnecessary if R1 or R2 < 20kohms
1
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n Pin Configuration
SO-8 Top View SO-8 Top View
IN GND GND EN
OUT GND GND ADJ
OUT ADJ GND NC
IN NC NC EN
AME8807AEHA
AME8807BEHA
n Ordering Information
Part Number
AME8807AEHA
Marking
8807 AEHA yyww 8807 BEHA yyww
Output Voltage Package
Adjustable SO-8
Operating Temp. Range
-40O C to +85O C
AME8807BEHA
Adjustable
SO-8
-40O C to +85O C
Please consult AME sales office or authorized Rep./Distributor for other package type availability.
2
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n Absolute Maximum Ratings:
Parameter Input Voltage Output Current Output Voltage ESD Classification Maximum 8 Unit V A V
PD / (VIN - VO)
GND - 0.3 to V IN + 0.3 B
n Recommended operating Conditions:
Parameter Ambient Temperature Range Junction Temperature Rating -40 to +85 -40 to +125 Unit
o
C C
o
n Thermal Information
Parameter Package 8807AEHA Thermal Resistance (ja) 8807BEHA 8807AEHA Internal Power Dissipation (PD ) ( T = 100oC) 8807BEHA Maximum Junction Temperature Maximum Lead Temperature ( 10 Sec) 810 150 300
o
Maximum 124
o
Unit
C/W
124 810 mW
C C
o
Caution: Stress above the listed absolute rating may cause permanent damage to the device
3
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n Electrical Specifications
TA = 25 o C unless otherwise noted
Parameter Input Voltage Output Voltage Accuracy Symbol VIN VO IO=600mA VO=VONOM -2.0% IO=1mA 1.5V1.2V VO>1.2V VO<0.8V IO=0mA IO=1mA to 600mA IO=5mA VIN=VO+1 to VO+2 VO < 2.0V VO >= 2.0V 0.02 0.2 150 30 30 50 20 15 30 20 0.04 Vrms A V V V A A A dB 600 600 800 300 30 30 600 50 50 0.15 0.1 1 See chart Test Condition Min Note 1 -1.5 Typ Max 8 1.5 1400 800 600 mA mA mA A A % % %
o o
Units V %
Dropout Voltage
VDROPOUT
mV
IO=1mA to 600mA
C C
ppm/oC
Output Voltage Noise ADJ Input Bias Current ADJ Reference Voltage EN Input Threshold
eN IADJ VREF VEH VEL IEH IEL ISD
1.203 1.215 1.227 VIN=2.7V to 8V VIN=2.7V to 8V VEN=VIN, VIN=2.7V to 8V VEN=0V, VIN=2.7V to 8V VIN=5V, VO=0V, VENEN Input Bias Current Shutdown Supply Current Note1:VIN(min)=VOUT+VDROPOUT
4
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n Detailed Description
The AME8807 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 600mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The AME8807 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8807 also incorporates current foldback to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts.
n Enable
The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1A. This pin behaves much like an electronic switch.
n ADJ
The ADJ pin is the positive input to the error amplifier which, due to the pmos pass element inversion, means it is actually the negative input of the LDO feedback loop. The feedback works to keep the voltage at the ADJ pin 1.215V with respect to ground. Since the internal circuitry at the ADJ pin is essentially an ESD protected CMOS gate the input current at the ADJ pin is virtually zero.
n External Capacitors
The AME8807 is stable with an output capacitor to ground of 2.2F 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 0.1F ceramic capacitor with a 10F 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 0.1F to have a beneficial effect. 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.
5
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
Ground Current vs. Input Voltage
45 40
Load Step ( 1mA-600mA)
Vo(10mV/DIV)
Ground Current (A)
35 30 25 20 15 10 5 0 0 1 2 3 4
85 O C
Output C L =2.2F CIN=2.2F
25 O C IL(200mA/DIV)
IL o a d
0 TIME ( 20mS/DIV)
5
6
7
8
Input Voltage (V)
Drop Out Voltage vs. Output Voltage
0.3
Power Supply Rejection Ratio
0 -10
Drop Out Voltage (V)
0.25 0.2 0.15 0.1 0.05 0 2 2.5 3 3.5
IL O A D= 6 0 0 m A
-20 PSRR (dB) -30 -40 -50 -60 -70
C L =2.2 F Tantalum C B Y P =0
100mA
100mA
10mA
100 A
100 A
1mA
4
4.5
5
5.5
-80 1.0E+01
1.0E+03
1.0E+05
1.0E+07
Output Voltage (V)
Frequency (Hz)
Safe Operating Area
600 8807AEHA 8807BEHA
Output Current (mA)
100
10 0.1 1.0 8.0
Input-Output Voltage Differential (V) 6
Analog Microelectronics, Inc.
AME8807
Noise Measurement
Overtemperature Shutdown
I OUT (200mA/DIV)
600mA CMOS LDO
Vo (1mV/ DIV)
CL = 2.2F NO FILTER
0
R L O A D =6.6
VOUT (1V/DIV)
0
TIME (20mS/DIV)
TIME (0.5Sec/DIV)
Current Limit Response
IOUT (200mA/DIV) VOUT (1V/DIV)
I OUT (200mV/DIV)
Short Circuit Response
C L O A D =2.2F C IN = 1F R L O A D < 1 0 0 m
TIME (2mS/DIV)
V OUT (1V/DIV)
C L O A D =2.2F C I N =1.0F R L O A D =3.3 V O U T N O M =3.3V
TIME (2mS/DIV)
Chip Enable Transient Response
Enable (2V/DIV)
Line Transient Response
VIN(1V/DIV)
C L =2F R L =10
0
Output (1V/DIV)
0 TIME ( 1mS/DIV)
VOUT (10mV/DIV)
C L O A D =2.2F IL O A D = 1 m A V O U T D C =3.3V V I N D C =4.5V
TIME (200mS/DIV) 7
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n External Resistor Divider Table
R1(kohm) Vout 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 2.95 3.00 3.05 3.10 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 R2(kohm)=(1.215*R1(kohm))/(Vout-1.215) 42.88 27.00 19.70 15.51 12.79 10.88 9.47 8.38 7.52 6.81 6.23 5.74 5.32 4.96 4.64 4.37 4.12 3.90 3.70 3.52 3.36 3.21 3.08 2.95 2.84 2.73 2.63 2.54 2.45 2.37 2.30 2.23 2.16 2.10 2.04 1.99 1.93 57.18 36.00 26.27 20.68 17.05 14.51 12.62 11.17 10.02 9.08 8.31 7.65 7.09 6.61 6.19 5.82 5.49 5.20 4.93 4.70 4.48 4.28 4.10 3.94 3.78 3.64 3.51 3.39 3.27 3.17 3.07 2.97 2.88 2.80 2.72 2.65 2.58 71.47 45.00 32.84 25.85 21.32 18.13 15.78 13.97 12.53 11.36 10.38 9.57 8.87 8.27 7.74 7.28 6.86 6.50 6.17 5.87 5.60 5.35 5.13 4.92 4.73 4.55 4.39 4.23 4.09 3.96 3.83 3.72 3.61 3.50 3.40 3.31 3.22 85.76 54.00 39.41 31.02 25.58 21.76 18.94 16.76 15.03 13.63 12.46 11.48 10.64 9.92 9.29 8.73 8.24 7.80 7.40 7.04 6.72 6.42 6.15 5.90 5.67 5.46 5.26 5.08 4.91 4.75 4.60 4.46 4.33 4.20 4.08 3.97 3.87 100.06 63.00 45.97 36.19 29.84 25.39 22.09 19.55 17.54 15.90 14.54 13.39 12.42 11.57 10.83 10.19 9.61 9.10 8.63 8.22 7.84 7.49 7.18 6.89 6.62 6.37 6.14 5.93 5.73 5.54 5.37 5.20 5.05 4.90 4.76 4.63 4.51 114.35 72.00 52.54 41.36 34.11 29.01 25.25 22.34 20.04 18.17 16.62 15.31 14.19 13.22 12.38 11.64 10.98 10.40 9.87 9.39 8.96 8.56 8.20 7.87 7.56 7.28 7.02 6.77 6.55 6.33 6.13 5.94 5.77 5.60 5.45 5.30 5.16 9.00 10.00
14.29 9.00 6.57 5.17 4.26 3.63 3.16 2.79 2.51 2.27 2.08 1.91 1.77 1.65 1.55 1.46 1.37 1.30 1.23 1.17 1.12 1.07 1.03 0.98 0.95 0.91 0.88 0.85 0.82 0.79 0.77 0.74 0.72 0.70 0.68 0.66 0.64
28.59 18.00 13.14 10.34 8.53 7.25 6.31 5.59 5.01 4.54 4.15 3.83 3.55 3.31 3.10 2.91 2.75 2.60 2.47 2.35 2.24 2.14 2.05 1.97 1.89 1.82 1.75 1.69 1.64 1.58 1.53 1.49 1.44 1.40 1.36 1.32 1.29
128.65 81.00 59.11 46.53 38.37 32.64 28.40 25.14 22.55 20.44 18.69 17.22 15.96 14.88 13.93 13.10 12.36 11.70 11.10 10.57 10.08 9.63 9.23 8.85 8.51 8.19 7.90 7.62 7.36 7.12 6.90 6.69 6.49 6.30 6.13 5.96 5.80
142.94 90.00 65.68 51.70 42.63 36.27 31.56 27.93 25.05 22.71 20.77 19.13 17.74 16.53 15.48 14.55 13.73 12.99 12.34 11.74 11.20 10.70 10.25 9.84 9.46 9.10 8.77 8.47 8.18 7.92 7.67 7.43 7.21 7.00 6.81 6.62 6.45
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Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n External Resistor Divider Table (contd.)
R1(kohm) Vout 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 3.55 3.60 3.65 3.70 3.75 3.80 3.85 3.90 3.95 4.00 4.05 4.10 4.15 4.20 4.25 4.30 4.35 4.40 4.45 4.50 4.55 4.60 4.65 4.70 4.75 4.80 4.85 4.90 4.95 5.00 1.00 0.63 0.61 0.60 0.58 0.57 0.56 0.54 0.53 0.52 0.51 0.50 0.49 0.48 0.47 0.46 0.45 0.44 0.44 0.43 0.42 0.41 0.41 0.40 0.39 0.39 0.38 0.38 0.37 0.36 0.36 0.35 0.35 0.34 0.34 0.33 0.33 0.33 0.32 2.00 1.26 1.22 1.19 1.17 1.14 1.11 1.09 1.06 1.04 1.02 1.00 0.98 0.96 0.94 0.92 0.91 0.89 0.87 0.86 0.84 0.83 0.81 0.80 0.79 0.78 0.76 0.75 0.74 0.73 0.72 0.71 0.70 0.69 0.68 0.67 0.66 0.65 0.64 3.00 4.00 5.00 6.00 7.00 R2(kohm)=(1.215*R1(kohm))/(Vout-1.215) 1.88 2.51 3.14 3.77 4.40 1.84 2.45 3.06 3.67 4.28 1.79 2.39 2.99 3.58 4.18 1.75 2.33 2.91 3.50 4.08 1.71 2.28 2.85 3.41 3.98 1.67 2.22 2.78 3.34 3.89 1.63 2.17 2.72 3.26 3.81 1.60 2.13 2.66 3.19 3.72 1.56 2.08 2.60 3.12 3.64 1.53 2.04 2.55 3.06 3.57 1.50 2.00 2.49 2.99 3.49 1.47 1.96 2.44 2.93 3.42 1.44 1.92 2.40 2.88 3.36 1.41 1.88 2.35 2.82 3.29 1.38 1.84 2.31 2.77 3.23 1.36 1.81 2.26 2.72 3.17 1.33 1.78 2.22 2.67 3.11 1.31 1.75 2.18 2.62 3.05 1.29 1.71 2.14 2.57 3.00 1.26 1.68 2.11 2.53 2.95 1.24 1.66 2.07 2.48 2.90 1.22 1.63 2.04 2.44 2.85 1.20 1.60 2.00 2.40 2.80 1.18 1.58 1.97 2.36 2.76 1.16 1.55 1.94 2.33 2.71 1.14 1.53 1.91 2.29 2.67 1.13 1.50 1.88 2.25 2.63 1.11 1.48 1.85 2.22 2.59 1.09 1.46 1.82 2.19 2.55 1.08 1.44 1.79 2.15 2.51 1.06 1.41 1.77 2.12 2.48 1.05 1.39 1.74 2.09 2.44 1.03 1.37 1.72 2.06 2.41 1.02 1.36 1.69 2.03 2.37 1.00 1.34 1.67 2.01 2.34 0.99 1.32 1.65 1.98 2.31 0.98 1.30 1.63 1.95 2.28 0.96 1.28 1.61 1.93 2.25 8.00 5.02 4.90 4.78 4.66 4.55 4.45 4.35 4.25 4.16 4.08 3.99 3.91 3.83 3.76 3.69 3.62 3.55 3.49 3.43 3.37 3.31 3.26 3.20 3.15 3.10 3.05 3.00 2.96 2.91 2.87 2.83 2.79 2.75 2.71 2.67 2.64 2.60 2.57 9.00 5.65 5.51 5.37 5.24 5.12 5.00 4.89 4.79 4.68 4.58 4.49 4.40 4.31 4.23 4.15 4.07 4.00 3.93 3.86 3.79 3.73 3.66 3.60 3.54 3.49 3.43 3.38 3.33 3.28 3.23 3.18 3.14 3.09 3.05 3.01 2.97 2.93 2.89 10.00 6.28 6.12 5.97 5.83 5.69 5.56 5.44 5.32 5.20 5.09 4.99 4.89 4.79 4.70 4.61 4.53 4.44 4.36 4.29 4.21 4.14 4.07 4.00 3.94 3.88 3.81 3.76 3.70 3.64 3.59 3.54 3.49 3.44 3.39 3.34 3.30 3.25 3.21
9
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n Package Dimension
SO-8
SYMBOLS A A1 A2 B
MILLIMETERS MIN MAX 1.35 1.75 0.10 -- 0.33 0.19 4.80 3.80 -- 5.80 0.40 -- 0 0.25 -- 0.51 0.25 5.00 4.00 -- 6.20 1.27 0.10 8
INCHES MIN MAX 0.053 0.069 0.004 -- 0.013 0.007 0.189 0.150 -- 0.228 0.016 0
0.010 -- 0.020 0.010 0.1970 0.157 -- 0.244 0.050 0.004 8
C D E e H L y
10
www.analogmicro.com
E-Mail: info@analogmicro.com
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. (c) Analog Microelectronics, Inc. , August 2001 Document: 2006-DS8807-C
Corporate Headquarters
Analog Microelectronics, Inc.
3100 De La Cruz Blvd. Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489
Asia Pacific Headquarters
AME, Inc.
2F, 187 Kang-Chien Road, Nei-Hu District Taipei 114, Taiwan, R.O.C. Tel : 886 2 2627-8687 Fax : 886 2 2659-2989

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