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AMC8878/8879
www.addmtek.com DESCRIPTION The AMC8878/8879 series is a low noise, low dropout linear regulator operating from 2.5V to 6.5V input. An external capacitor can be connected to the bypass pin to lower the output noise level to 30VRMS. Designed with a P-channel MOSFET output transistor, the AMC8878/8879 consume a low supply current, independent of the load current and dropout voltage. The internal thermal shut down circuit will limits the junction temperature to below 150C. Other features include thermal protection, reverse battery protection and output current limit. Both AMC8878 and AMC8879 come in a miniature 5-pin SOT-23 package.
LOW NOISE 150mA LOW DROPOUT REGULATOR
FEATURES Low output noise: 30VRMS Industry standard'2982 pin assignment (AMC8878) Output voltage precision of 1.4% accuracy Very low dropout voltage: 50mV/50mA and 165mV/150mA On/Off control Low IQ: 1.6A Short circuit protection Internal thermal overload protection Available in surface mount 5-pin SOT-23 package. Enhanced pin-to-pin Compatible to the MAX8878 (AMC8878) and TK111xxS (AMC8879) series. PACKAGE PIN OUT
VIN
1 5
APPLICATIONS Cellular Telephones Battery Powered Systems Hand-Held Instruments Pagers Personal Data Assistance (PDA) PCMCIA Cards
VOUT
SHDN 1 GND 2
5 VIN
GND 2 SHDN 3
4
BP
BP 3
4 VOUT
AMC8878 5-Pin Plastic SOT-23 Surface Mount (Top View)
AMC8879
ORDER INFORMATION Plastic SOT-23 5-pin O O 0 C TA 70 C AMC8878-X.XDBT 0OC TA 70OC AMC8878-X.XDBTF(Lead Free) Temperature Range
DBT
Plastic SOT-23 5-pin AMC8879-X.XDBT AMC8879-X.XDBTF(Lead Free)
DBT
EXPANDED ORDER INFORMATION Device Name AMC887-1.8DBT AMC887-2.0DBT AMC887-2.5DBT AMC887-2.8DBT AMC887-2.85DBT AMC887-3.0DBT AMC887-3.2DBT AMC887-3.3DBT AMC887-5.0DBT
Copyright (c) 2006 ADDtek Corp.
Output Voltage 1.8V 2.0V 2.5V 2.8V 2.85V 3.0V 3.2V 3.3V 5.0V
1
Symbolization AMC8878 AB18 AB20 AB25 AB28 AB2U AB30 AB32 AB33 AB50 AMC8879 AC18 AC20 AC25 AC28 AC2U AC30 AC32 AC33 AC50
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AMC8878/8879
TYPICAL APPLICATION
VIN 2.5V to 6V
VOUT CIN 1F
AMC8878 AMC8879
COUT 1F
ON OFF
CBP 0.01F
ABSOLUTE MAXIMUM RATINGS Input Voltage, VIN Operating Junction Temperature, TJ Storage Temperature Range Lead Temperature (soldering, 10 seconds) Power Dissipation, PD @ TA = 70 OC
Note: Exceeding these ratings could cause damage to the device. negative out of the specified terminal.
(Note) 12V 150 OC -65 OC to +150 OC +260 OC 150 mW
All voltages are with respect to Ground. Currents are positive into,
THERMAL DATA DB PACKAGE: Thermal Resistance from Junction to Ambient, JA Junction Temperature Calculation: TJ = TA + (PD x JA). The JA numbers are guidelines for the thermal performance of the device/pc-board system. Connect the ground pin to ground using a large pad or ground plane for better heat dissipation. All of the above assume no ambient airflow. Maximum Power Calculation: - TA(MAX) T PD(MAX)= J(MAX) JA TJ(OC): Maximum recommended junction temperature TA(OC): Ambient temperature of the application JA(OC /W): Junction-to-junction temperature thermal resistance of the package, and other heat dissipating materials. The maximum power dissipation for a single-output regulator is : PD(MAX) = [(VIN(MAX) - VOUT(NOM))] x IOUT(NOM) + VIN(MAX) x IQ Where: VOUT(NOM) = the nominal output voltage IOUT(NOM) = the nominal output current, and IQ = the quiescent current the regulator consumes at IOUT(MAX) VIN(MAX) = the maximum input voltage Then JA = (+150 OC - TA)/PD 220 OC /W
Copyright (c) 2006 ADDtek Corp.
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AMC8878/8879
BLOCK DIAGRAM
Reverse Battery Protection
VIN
SHDN
Shutdown And Power-On Control Current Limit
VOUT
Thermal Sensor
VREF
GND BP
PIN DESCRIPTION Pin Number AMC8878 AMC8879 1 5 2 2 3 4 5 1 3 4 Pin Name VIN GND SHDN BP VOUT Pin Function Input Ground Logic control shutdown pin; HI: Device is ON, LO: Device is OFF Noise bypass pin; The output noise level can be reduced to 30VRMS by connecting external capacitors Output
RECOMMENDED OPERATING CONDITIONS Recommended Operating Conditions Parameter Symbol Min. Typ. Max. Input Voltage VIN 2.5 6.5 Load Current IO 5 150 Input Capacitor (VIN to GND) 1.0 Output Capacitor with ESR of 10 max., (VOUT to GND) 1.0
Units V mA F F
Note: 1. CIN: A 1.0 F capacitor (or larger) should be placed between VIN to GND. 2. COUT: A 1.0 F (or larger) capacitor is recommended between VOUT and GND for stability and improving the regulator's transient response. The ESR (Effective Series Resistance.) of this capacitor has no effect on regulator stability, but low ESR capacitors improve high frequency transient response. The value of this capacitor may be increased without limit, but values larger than 10uF tend to increase the settling time after a step change in input voltage or output current. The part may oscillate without the capacitor. Any type of capacitor can be used, but not Aluminum electrolytics when operating below -25 OC, The capacitance may be increased without limit.
Copyright (c) 2006 ADDtek Corp.
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AMC8878/8879
ELECTRICAL CHARACTERISTICS Unless otherwise specified, these specifications apply over the operating ambient temperature of 0C to +70 C with VIN = VOUT(NOMIAL) + 0.5V, and are for DC characteristics only. (Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Output Voltage Accuracy Maximum Output Current Current Limit Ground Pin Current Symbol VOUT IOUT ILIMIT IOUT = 10mA IOUT = 150mA IOUT = 1mA VDROP IOUT = 50mA IOUT = 150mA IQ VOI VOL PSRR en VIN = (VOUT + 0.1V) to 6.5V, IOUT = 1mA -0.15 IOUT = 10 to 120mA, COUT = 1F f=100Hz, IL=100uA f = 10Hz - 100KHz, CBP = 0.01F VIN = 2.5V to 5.5V VIN = 2.5V to 5.5V TA = +25 C TA = +85 OC TA = +25 OC TA = +85 OC TA = +25 OC TA = +85 OC
O
Test Conditions IOUT = 10mA, TA = +25 OC IOUT = 10 to 150mA
AMC8878/8879
Min -1.4 -3 150 160
Typ.
Max +1.4 +2
Units % mA mA
Dropout Voltage Line Regulation Load Regulation Ripple Rejection Output Voltage Noise
COUT = 10F COUT = 100F 2.0
1.6 1.7 1.1 50 165 0 0.01 50 30 20
10
A
120 0.15 0.04
mV %/V %/mA dB VRMS V V A nA
Shutdown Input Threshold High Shutdown Input Threshold Low Shutdown Supply Current Shutdown Input Bias Current
VSIH VSIL
IQ(SHDN) VOUT = 0V ISHDN VSHDN = VIN
0.01 0.2 0.01 0.5 6 6 +150
0.4 1 100
Shutdown Exit Delay Thermal Shutdown Temperature
tdelay TSHDN
CBP = 0.1F, COUT = 1F, No load
ms
O
C
Note: 1. Current limit is measured at constant junction temperature, using pulse ON time. 2. Dropout is measured at constant junction temperature, using pulse ON time, and criterion is VOUT inside target value 2 %. 3. Regulation is measured at constant junction temperature, using pulsed ON time.
Copyright (c) 2006 ADDtek Corp.
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AMC8878/8879
CHARACTERIZATION CURVES VIN=VOUT(NOMINAL) + 0.5V or 2.5V(whichever is greater), CIN=1uF, COUT=1uF,CBP=0.01uF, TA=+25 OC, Using plused ON time,unless otherwise noted.
Output Voltage v.s. Output Current
3.5
Quiescent Current v.s. Output Current
2
Quiescent Current (A)
Output Voltage(V)
VOUT=3.3V
3.4 3.3
1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0
3.2
3.1
3
2.9
2.8 0 20 40 60 80 100 120 140
0
25
50
75
100
125
150
Output Current (V)
Output Current (mA)
Output Voltage v.s. Input Voltage
3.5
Quiescent Current v.s. Input Voltage
Quiescent Current (A)
2.4 2.2 2 1.8 1.6 1.4 1.2
Output Voltage (V)
3.4
IO=10mA
VOUT=3.3V
3.3
IO=150mA
3.2
IO=150mA
3.1
3 4 4.5 5 5.5 6
IO=10mA
4 4.5 5 5.5 6
Input Voltage (V)
1
Input Voltage (V)
Output Voltage v.s. Temperature
3.48 3.44
Quiescent Current v.s. Temperature
2.4
VOUT=3.3V
Quiescent Current (A)
105
2.2 2 1.8 1.6 1.4 1.2 1
Output Voltage (V)
3.4
IO=10mA
3.36 3.32 3.28 3.24 3.2 25 45 65 85
IO=150mA
25
45
65
85
105
Temperature (OC)
Copyright (c) 2006 ADDtek Corp. 5
Temperature (OC)
DD067_G -JUNE 2006
AMC8878/8879
CHARACTERIZATION CURVES (Continued)) VIN=VOUT(NOMINAL) + 0.5V or 2.5V(whichever is greater), CIN=1uF, COUT=1uF,CBP=0.01uF, TA=+25 OC, Using plused ON time,unless otherwise noted.
Dropout Voltage v.s. Output Current
Dropout Voltage (V)
0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 25 50 75 100 125 150
Dropout Voltage v.s. Temperature
0.3
Dropout Voltage (V)
0.24
IO=150mA
0.25 0.2
0.15
0.1
0.05
0 25 45 65 85 105
Output Current (mA)
Temperature (OC)
75mA/ Div
Load Transient Response with IO=50mA
25mA/ Div
COUT=1uF
Load Transient Response with IO=150mA
COUT=1uF
IO VO
IO VO
50mV/ Div
50mV/ Div
Time=2ms
Time=2ms
Line Transient Response, With IO=50mA
1V/ Div 2V/ Div
VOUT=3.3V
Entering Shutdown, No Load
VSHDN
0.5V/ Div
1V/ Div
VOUT Time=2ms
Time=1ms
Copyright (c) 2006 ADDtek Corp. 6
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AMC8878/8879
CHARACTERIZATION CURVES (Continued)) VIN=VOUT(NOMINAL) + 0.5V or 2.5V(whichever is greater), CIN=1uF, COUT=1uF,CBP=0.01uF, TA=+25 OC, Using plused ON time,unless otherwise noted.
Shutdown Exit Delay, CBP= 0.1uF
Shutdown Exit Delay, CBP= 2pF
2V/ Div
1V/ Div
1V/ Div
VOUT
IO=50mA VOUT=3..3V
2V/ Div
VSHDN
VSHDN
VOUT
IO=50mA VOUT=3..3V
Time=2ms
Time=200s
Copyright (c) 2006 ADDtek Corp.
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AMC8878/8879
PACKAGE
5-Pin SOT-23
D b L L1
SEATING PLANE
INCHES MIN A A1 TYP MAX 0.057 0.006
MILLIMETERS MIN 0.90 0.30 0.08 TYP 1.15 2.90 BSC 2.80 BSC 1.60 BSC 0.95 BSC 1.90 BSC 0.30 0.45 0.60 REF 0.25 BSC 15 5 10 15 0.60 MAX 1.45 0.15 1.30 0.50 0.22
E
E1
A2 0.035 0.045 0.051 b c 0.012 0.003 0.020 0.009
e e1
c
L2
D E
0.114 BSC 0.110 BSC 0.063BSC 0.037 BSC 0.075BSC 0.012 0.018 0.024 0.024 REF 0.010 BSC 5 10
GAUGE PLANE
E1 e e1
M
A
A2
L
M
L1 L2 M
A1
Copyright (c) 2006 ADDtek Corp.
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AMC8878/8879
IMPORTANT NOTICE
ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of its products to the specifications applicable at the time of sale.
ADDtek Corp. 9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105 TEL: 2-25700299 FAX: 2-25700196
Copyright (c) 2006 ADDtek Corp. 9 DD067_G -JUNE 2006

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