AMC DOC. #:AMC8878_A (LF)
Jun 2004
AMC8877
LOW NOISE 300mA
LOW DROPOUT REGULATOR
®
A
D
D MICROTECH CORP.
DESCRIPTION FEATURES
The AMC8877 product 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
30µVRMS.
Designed with a P-channel MOSFET output
transistor, the AMC8877 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 150°C. Other features include thermal
protection, reverse battery protection and output
current limit. The AMC8877 come in a miniature
5-pin SOT-23 package.
Low output noise: 30µVRMS
Industry standard’2982 pin assignment
(AMC8877)
Output voltage precision of ±1.4% accuracy
Very low dropout voltage: 50mV/50mA,
165mV/150mA & 450mV/300mA
On/Off control
Low IQ: 1.6µA
Short circuit protection
Internal thermal overload protection
Available in surface mount 5-pin SOT-23 package.
Enhanced pin-to-pin Compatible to the MAX8878
(AMC8877).
APPLICATIONS PACKAGE PIN OUT
Cellular Telephones
Battery Powered Systems
Hand-Held Instruments
Pagers
Personal Data Assistance (PDA)
PCMCIA Cards
ORDER INFORMATION
Plastic SOT-23
Temperature
Range DBT 5-pin
0OC ≤ TA≤ 70OC AMC8877-X.XDBT
0OC ≤ TA≤ 70OC AMC8877-X.XDBTF(Lead Free)
VOUT
5
2
1
BP
34
VIN
GND
SHDN
AMC8877
5-Pin Plastic SOT-23
Surface Mount
(Top View)
EXPANDED ORDER INFORMATION Symbolization
Device Name Output Voltage AMC8877
AMC887ڤ-1.8DBT 1.8V CG18
AMC887ڤ-2.0DBT 2.0V CG20
AMC887ڤ-2.5DBT 2.5V CG25
AMC887ڤ-2.8DBT 2.8V CG28
AMC887ڤ-2.85DBT 2.85V CG2U
AMC887ڤ-3.0DBT 3.0V CG30
AMC887ڤ-3.2DBT 3.2V CG32
AMC887ڤ-3.3DBT 3.3V CG33
AMC887ڤ-5.0DBT 5.0V CG50
Copyright © 2002, ADD Microtech Corp. 1 www.addmtek.com
AMC DOC. #: AMC8877_A (LF) AMC8877
Jun 2004
LOW NOISE 300mA
LOW DROPOUT
R
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TYPICAL APPLICATION
CBP
0.01µF
AMC8877
ON OFF
VIN
2.5V to 6V CIN
1µFCOUT
1µF
VOUT
ABSOLUTE MAXIMUM RATINGS (Note)
Input Voltage, VIN 12V
Operating Junction Temperature, TJ150 OC
Storage Temperature Range -65 OC to +150 OC
Lead Temperature (soldering, 10 seconds) +260 OC
Power Dissipation, PD @ TA = 70 OC 150 mW
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground.
Currents are positive into, negative out of the specified terminal.
THERMAL DATA
DB PACKAGE:
Thermal Resistance from Junction to Ambient, θ JA 220 OC /W
Junction Temperature Calculation: TJ = TA + (PD × θ JA).
The θJA 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:
T
J(MAX) – TA(MAX)
PD(MAX)= θJA
T
J(OC): Maximum recommended junction temperature
T
A(OC): Ambient temperature of the application
θJA(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) - V
OUT(NOM))] × IOUT(NOM) + VIN(MAX) × 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 θJA = (+150 OC – TA)/PD
Copyright © 2002, ADD Microtech Corp. 2 www.addmtek.com
AMC DOC. #: AMC8877_A (LF) AMC8877
Jun 2004
LOW NOISE 300mA
LOW DROPOUT
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BLOCK DIAGRAM
Current
Limit
Reverse
Battery
Protection
Shutdown
And
Power-On
Control
VREF
Thermal
Sensor
VIN
SHDN
VOUT
GND BP
PIN DESCRIPTION
Pin Number
AMC8878 AMC8879 Pin Name Pin Function
1 5 VIN Input
2 2 GND Ground
3 1
SHDN Logic control shutdown pin; HI: Device is ON, LO: Device is OFF
4 3 BP
Noise bypass pin; The output noise level can be reduced to 30µVRMS by
connecting external capacitors
5 4 VOUT Output
Copyright © 2002, ADD Microtech Corp. 3 www.addmtek.com
AMC DOC. #: AMC8877_A (LF) AMC8877
Jun 2004
LOW NOISE 300mA
LOW DROPOUT
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RECOMMENDED OPERATING CONDITIONS
Recommended Operating Conditions
Parameter Symbol Min. Typ. Max. Units
Input Voltage VIN 2.5 6.5 V
Load Current IO5 300 mA
Input Capacitor (VIN to GND) 1.0 µF
Output Capacitor with ESR of 10Ω max., (VOUT to GND) 1.0 µF
Note:
1. CIN: A 1.0 µF capacitor (or larger) should be placed between VIN to GND.
2. COUT: A 1.0 µF (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
electrol
y
tics when o
p
eratin
g
below -25 OC
,
The ca
p
acitance ma
y
be increased without limit.
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperature of 0°C 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.)
AMC8877
Parameter Symbol Test Conditions Min Typ. Max Units
IOUT = 10mA, TA = +25 OC -1.4 +1.4
Output Voltage Accuracy ∆VOUT IOUT = 10 to 300mA -3 +2 %
Maximum Output Current IOUT 300 mA
Current Limit ILIMIT 330 mA
IOUT = 10mA 1.6 9
Ground Pin Current IQIOUT = 300mA 1.7 9
µA
IOUT = 50mA 50 120
IOUT = 150mA 165 300
Dropout Voltage VDROP
IOUT = 300mA 450 650
mV
Line Regulation ∆VOI VIN = (VOUT + 0.1V) to 6.5V, IOUT = 1mA -0.15 0 0.15 %/V
Load Regulation ∆VOL IOUT = 10 to 300mA, COUT = 10µF 40 80 mV
Ripple Rejection PSRR f=100Hz, IL=100uA 50 dB
COUT = 10µF 30
Output Voltage Noise en
f = 10Hz - 100KHz,
CBP = 0.01µF COUT = 100µF 20
µVRMS
Shutdown Input Threshold High VSIH VIN = 2.5V to 5.5V 2.0 V
Shutdown Input Threshold Low VSIL VIN = 2.5V to 5.5V 0.4 V
TA = +25 OC 0.01 1
Shutdown Supply Current IQ(SHDN) VOUT = 0V TA = +85 OC 0.2 µA
TA = +25 OC 0.01 100
Shutdown Input Bias Current ISHDN VSHDN = VIN TA = +85 OC 0.5 nA
TA = +25 OC 6
Shutdown Exit Delay tdelay
CBP = 0.1µF,
COUT = 1µF, No load TA = +85 OC 6
ms
Thermal Shutdown Temperature TSHDN +150 OC
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 © 2002, ADD Microtech Corp. 4 www.addmtek.com
AMC DOC. #: AMC8877_A (LF) AMC8877
Jun 2004
LOW NOISE 300mA
LOW DROPOUT
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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.
Quiescent Current v.s. Output Current
Output Voltage v.s. Output Current
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
0 25 50 75 100 125 150
2.8
2.9
3
3.1
3.2
3.3
3.4
3.5
0 20 40 60 80 100 120 140
VOUT=3.3V
Output Voltage(V)
Quiescent Current (µA)
Output Current (mA)
Output Current (V)
Output Voltage v. s. Input Voltage Quiescent Current v.s. Input Voltage
3
3.1
3.2
3.3
3.4
3.5
44.5 55.56
VOUT=3.3V
IO=10mA
IO=150mA
Ou
t
put Voltage (V)
1
1.2
1.4
1.6
1.8
2
2.2
2.4
44.5 55.5 6
IO=150mA
IO=10mA
Quiescent Current (µA)
Input Voltage (V)
Input Voltage (V)
Output Voltage v.s. Temperature
1
1.2
1.4
1.6
1.8
2
2.2
2.4
25 45 65 85 105
Quiescent Current (µA)
Temperature (OC)
Quiescent Current v.s. Temperature
3.2
3. 24
3. 28
3. 32
3. 36
3.4
3. 44
3. 48
25 45 65 85 105
IO=150mA
IO=10mA
VOUT=3.3V
Output Voltage (V)
Temperature (OC)
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AMC DOC. #: AMC8877_A (LF) AMC8877
Jun 2004
LOW NOISE 300mA
LOW DROPOUT
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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. Temperature
Dropout Voltage v.s. Output Current
0
0.05
0.1
0.15
0.2
0.25
0.3
I
O
=150mA
25 45 65 85 105
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
0.22
0.24
0 25 50 75 100 125 150
Dropout Voltage (V)
Dropout Voltage (V)
Output Current (mA)
Temperature (OC)
Load Transient Response
with IO=150mA
Load Transient Response
with IO=50mA
COUT=1uF
VO
IO
VO
IO
COUT=1uF
75mA/ Div
25mA/ Div
50mV/ Div
50mV/ Div
Time=2ms
Time=2ms
ILOAD = 300mA VIN = 3V
No Load
Load
Copyright © 2002, ADD Microtech Corp. 6 www.addmtek.com
AMC DOC. #: AMC8877_A (LF) AMC8877
Jun 2004
LOW NOISE 300mA
LOW DROPOUT
R
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3.16V
(
Vo
~
-V
p)
300mA
(Vo~Vp) 300mA
(
Vo~V
p)
3.12V
(
Vo
~
-V
p)
Line Transient Response,
With IO=50mA Entering Shutdown,
No Load
VSHDN
VOUT
VOUT=3.3V
2V/ Div
1V/ Div
1V/ Div
0.5V/ Div
Time=1ms Time=2ms
Shutdown Exit Delay,
CBP= 0.1uF Shutdown Exit Delay,
CBP= 2pF
IO=50mA
VOUT=3..3V
VOUT
VSHDN
IO=50mA
VOUT=3..3V
VOUT
VSHDN
2V/ Div
2V/ Div
1V/ Div
1V/ Div
Time=2ms Time=200
µ
s
Copyright © 2002, ADD Microtech Corp. 7 www.addmtek.com
AMC DOC. #: AMC8877_A (LF) AMC8877
Jun 2004
LOW NOISE 300mA
LOW DROPOUT
R
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5-Pin SOT-23
INCHES MILLIMETERS
MIN TYP MAX MIN TYP MAX
A - - 0.057 - - 1.45
A1 - - 0.006 - - 0.15
A2 0.035 0.045 0.051 0.90 1.15 1.30
b 0.012 - 0.020 0.30 - 0.50
c 0.003 - 0.009 0.08 - 0.22
D 0.114 BSC 2.90 BSC
E 0.110 BSC 2.80 BSC
E1 0.063`BSC 1.60 BSC
e 0.037 BSC 0.95 BSC
e1 0.075BSC 1.90 BSC
L 0.012 0.018 0.024 0.30 0.45 0.60
L1 0.024 REF 0.60 REF
L2 0.010 BSC 0.25 BSC
°M5° 10°15° 5° 10°15°
LL1
L2
A2
A
A1 M
E1
E
e
e1
D
b
c
M
SEATING PLANE
GAUGE PLANE
Copyright © 2002, ADD Microtech Corp. 8 www.addmtek.com
AMC DOC. #: AMC8877_A (LF) AMC8877
Jun 2004
LOW NOISE 300mA
LOW DROPOUT
R
EGULATO
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IMPORTANT NOTICE
ADD Microtech (ADDM) 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. ADDM 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
ADDM 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.
ADDM assumes to no liability to customer product design or application support. ADDM warrants the performance of
its products to the specifications applicable at the time of sale.
U.S. Asia Pacific region
ADD Microtech Inc.
492 Altamont Drive
Milpitas, CA 95035
ADD Microtech Corp
13F, NO. 287, Sec. 3, Nan Jing E. Rd.,
Taipei, Taiwan 105
TEL: (408) 9410420 TEL: 2-27132800
FA X : (408) 9410864 FA X: 2-27132805
Copyright © 2002, ADD Microtech Corp. 9 www.addmtek.com
