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AME, Inc.
AME8750
n General Description
The AME8750 dual, low dropout, linear regulators operate from Higher V OUT+VDROPOUT to 5.5V input and deliver up to 150mA / 150mA output current each. It has a bypass pin option allows users to decouple the bandgap reference for reducing the output noise. Low dropout voltage and low quiescent current(70A typ.)make them ideal for battery applications. The AME8750 is available with a wide variety of voltage options as standard and can be trimmed to 1.5% accuracy. For protection purpose, AME8750 has both thermal shutdown and current fold-back to prevent device failure under the " worst" of operating conditions.
Low-Dropout 150mA / 150mA Dual CMOS Regulator
n Functional Block Diagram
EN1
ON/OFF Control
Error Amp1
Current Limit
VOUT1 R11
VR1 Each Circuit
R12 VI N
GND
Error Amp2
Current Limit
VR2 Each Circuit Voltage Reference
V OUT2 R21
EN2
ON/OFF Control
R22
n Features
l Very Low Dropout Voltage l Guaranteed 150mA / 150mA Each Output l Accurate to Within 1.5% For Both Outputs l Typical 70 A Quiescent Current l Over-Temperature Shutdown l Current Limiting l Short Circuit Current Fold-back l Noise Reduction Bypass Cap l Power-saving Shutdwon Mode l All AME's Lead Free Product Meet RoHS Standard
n Typical Applications
Fixed Version
VIN
VIN EN V OUT1
VOUT1
AME8750A
VOUT2 BYP GND V OUT2
1F
10nF
1F
1F
n Applications
l Cellular Phones l Palm / Notebook l Battery Power Equipment l Handheld Instruments
VIN
VIN EN1
VOUT1
V OUT1
AME8750B
EN2 GND V OUT2 VOUT2
1F
1F
1F
1
AME, Inc.
AME8750
n Pin Configuration
SOT-26 Top View
6 5 4
Low-Dropout 150mA / 150mA Dual CMOS Regulator
SOT-26 Top View AME 8750AEEY 1. VOUT2 2. GND
6 5 4
AME 8750BEEY 1. VOUT2 2. GND
AME8750
3. BYP 4. EN 5. VIN
AME8750
3. EN1 4. EN2 5. VIN
1
2
3
6. VOUT1 * Die Attach: Conductive Epoxy
1
2
3
6. VOUT1 * Die Attach: Conductive Epoxy
n Pin Description
Pin Number AME8750A
1
Pin Name
Description
Regulator 2 Output. Sources up to 150mA continuous current. Bypass with a 1F (< 0.5 typ ESR) capacitor to GND. Ground. This pin also functions as heatsink. Solder to a large pad or the circuit-board ground plane to maximize thermal dissipation. Reference Noise Bypass. Bypass with a low leakage 10nF ceramic capacitor for reduced nise at both outputs. Shutdown 1 Input. A logic low shuts down regulator 1. If EN1 and EN2 are both low, both regulators and the reference turn off. If either EN1 and EN2 is a logic high, the reference is on. Connect to VIN for normal operation. Shutdown Input. A logic low shuts down both regulators. Connect to VIN for normal operation. Shutdown 2 Input. A logic low shuts down regulator 2. If EN1 and EN2 are both low, both regulators and the reference turn off. If either EN1 and EN2 is a logic high, the reference is on. Connect to VIN for normal operation. Regulator Input. Supply voltage can range from Higher VOUT+VDROPOUT to 5.5V. This input also supplies the onchip reference. Bypass with 1F to GND. Regulator 1 Output. Sources up to 150mA continuous current. Bypass with a 1F (< 0.5 typ ESR) capacitor to GND.
AME8750B
1 VOUT2
2
2
GND
3
N/A
BYP
N/A
3
EN1
4
N/A
EN
N/A
4
EN2
5
5
VIN
6
2
6
VOUT1
AME, Inc.
AME8750 Low-Dropout 150mA / 150mA Dual CMOS Regulator
n Ordering Information (contd.) AME8750 x x x x xxxx x
Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Number of Pins Y: 6 Output Voltage (Both LDOs)
Pin Configuration A
(SOT-26)
Operating Ambient Temperature Range E: -40OC to +85OC
Package Type E: SOT-2X
Special Feature
1. VOUT2 2. GND 3. BYP 4. EN 5. VIN 6. VOUT1 1. VOUT2 2. GND 3. EN2 4. EN1 5. VIN 6. VOUT1
1825: VOUT1=1.8V Y: Lead free & Low profile VOUT2=2.5V Z: Lead free 1828: VOUT1=1.8V VOUT2=2.8V
B
(SOT-26)
3
AME, Inc.
AME8750
n Ordering Information
Part Number
AME8750AEEY1828Z AME8750AEEY1828Y AME8750BEEY1828Z AME8750BEEY1828Y AME8750AEEY1825Z AME8750AEEY1825Y AME8750BEEY1825Z AME8750BEEY1825Y
Low-Dropout 150mA / 150mA Dual CMOS Regulator
Marking*
BCKww BCKww BCJww BCJww BCSww BCSww BBHww BBHww
Output Voltage Package
VOUT1=1.8V VOUT2=2.8V VOUT1=1.8V VOUT2=2.8V VOUT1=1.8V VOUT2=2.8V VOUT1=1.8V VOUT2=2.8V VOUT1=1.8V VOUT2=2.5V VOUT1=1.8V VOUT2=2.5V VOUT1=1.8V VOUT2=2.5V VOUT1=1.8V VOUT2=2.5V SOT-26 TSOT-26 SOT-26 TSOT-26 SOT-26 TSOT-26 SOT-26 TSOT-26
Operating Ambient Temperature Range
- 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC
Note:ww represents date code and pls refer to Date Code Rule before Package Dimension. * A line on top of the first letter represents lead free plating such as BCKww. Please consult AME sales office or authorized Rep./Distributor for voltage accuracy and package type availability.
4
AME, Inc.
AME8750
n Absolute Maximum Ratings
Parameter
Input Voltage Output Current Output Voltage ESD Classification
Low-Dropout 150mA / 150mA Dual CMOS Regulator
Maximum
5.5 PD /2V IN -(V OUT1+VOUT2) GND-0.3 to VIN +0.3 B*
Unit
V mA V
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. * HBM B: 2000V~3999V
n Recommended Operating Conditions
Parameter
Ambient Temperature Range Junction Temperature Range
Symbol
TA TJ
Rating
-40 to +85 -40 to +125
Unit
o
C C
o
n Thermal Information
Parameter
Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Maximum Junction Temperature Solder Iron (10 Sec)** * Measure JC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F SOT-26 Conductive Epoxy
Package
Die Attach
Symbol
JC
Maximum
81
Unit
o
C/W
JA
260
PD
400 150 350
mW
o
C C
o
5
AME, Inc.
AME8750
n Electrical Specifications
Low-Dropout 150mA / 150mA Dual CMOS Regulator
Unless specified: TJ=25OC, VIN=Higher VOUT+1V, IOUT1=IOUT2=1mA, CIN=COUT=1.0F, VEN1=VEN2=VIN Typical values are at TJ=25OC
Parameter IN Input Supply Voltage Quiescent Current OUT1, OUT2 IOUT=1mA Output Voltage VO 0mA=2.5V Current Limit Short Circuit Current Ripple Rejection ILIM ISC f=100HZ , C BYP=10nF PSRR f=1kHZ , C BYP =10nF f=10kHZ , C BYP=10nF f=10Hz to 100kHz, IOUT=36mA Output Voltage Noise eN CBYP =10nF, COUT=1F, 1.8V Output f=10Hz to 100kHz, IOUT=36mA COUT=1F, 1.8V Output EN1, EN2 Enable Input Threshold V EH V IN =2.4V to 5.5V V IN =2.4V to 5.5V V IN =5.0V TJ =-40 oC to +125oC EN=0V EN=5V 0.3 1.25 150 20 1 ms
o o
Symbol V IN IQ
Test Condition
Min Note1
Typ
Max 5.5
Units V A
70 -1.5 -2 -0.2
o
160 1.5
TJ =-40 oC to +125oC TJ =25oC
o
V OUT
2 0.2 0.25
%
TJ =-40 C to +125 C -0.25 1mA%/V
-0.005 +0.0025 0.005 %/mA 350 mV
TJ =-40 oC to +125oC 300 180 200 54 54 48 50 VRMS 550 dB 600 350 mV
mA
2.4 0.4 -1 0.5 1
V V A
VEL
EN Input Bias Current Shutdown Current BYP Start-Up Rise Time Over Temperature Protection Over Temperature Shutdown Over Temperature Hysteresis OTS OTH IEL IEH ISHDN
V IN =5.0V, EN1=EN2=0V CB Y P=10nF
C C
Note1: VIN(min) =Higher VOUT+ V Dropout
6
AME, Inc.
AME8750
n Detailed Description
The AME8750 is low-dropout, low quiescent-current linear regulatior designed primarily for battery-powered applications. These parts are available with preset output voltage ranging from 1.8V to 3.3V, and the parts can supply loads up 150mA.
Low-Dropout 150mA / 150mA Dual CMOS Regulator
n Application Information
Capacitor Selection and Regulator Stability
Use a 1F capacitor on the AME8750A/ AME8750B input and a 1F capacitor on the outputs. Larger input capacitor values and lower ESRs provide better supplynoise rejection and line transient response.
Shutdown
AME8750A The AME8750A has a single shutdown control input(EN). Drive EN low to shut down both outputs, reducing supply current to 0.3A. Connect EN to a logic-high, or IN, for normal operation. AME8750B The AME8750B has independent shutdown control inputs (EN1 and EN2). Drive EN1 low to shutdown V OUT1. Drive EN2 low to shut down V OUT2. Drive both EN1 and EN2 low to shut down the entire chip, reducing supply current to 0.3mA. Connect both EN1 and EN2 to a logic-high, or IN, for normal operation.
PSRR and Operation from Sources Other than Batteries
The AME8750A/AME8750B are designed to deliver low dopout voltages and low quiescent currents in batterypowered systems. Power-supply rejection is 54dB at low frequencies. (See the PSRR vs. Frequency graph)
Internal P-Channel Pass Transistor
The AME8750A/AME8750B feature two 1 P-Channel MOSFET pass transistors. A P-Channel MOSEFT provides several advantages over similar designs using PNP pass transistors, including longer battery life. It requires no base drive, which reduces quiescent current significantly. The AME8750A/AME8750B only consume 70A of quiescent current whether in dropout, light-load, or heavy-load applications.
Current Limit
The AME8750A/8750B contain two independent current limiters, one for each regulator, which monitor and control the pass transistor' s gate voltage, limiting the guaranteed maximum output current to 150mA minimum. The output can be shorted to ground for an indefinite time without damaging the part.
Thermal-Overload Protection
Thermal -overload protection limits toatl power dissipation in the AME8750A/AME8750B. When the junction trmperature exceeds TJ=150oC, the themal sensor signals the shutdown logic, turning off the pass transistor and allowing the IC to cool.
7
AME, Inc.
AME8750
Quiescent Current vs Input Voltage
140
Low-Dropout 150mA / 150mA Dual CMOS Regulator
Dropout Voltage vs Load Current
300
120
125 C
O
O
V OUT =2.5V
250
Q uiescent Curr ent (uA)
Dropout Voltage (m V)
85 C
100
O
55J 85J 125 J
55 C
80 60 40 20 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
O
200
25 C
O
150
-5 C
O
25J -45J -5J
-45 C
100
50
0
0
50
100
150
Input Voltage (V)
Load Current (mA)
Supply Current vs. Load current
90 80
Supply Current (uA)
Dropout Voltage @ 150m A (mV)
350 300
Dropout Voltage vs Output Voltage
70 60 50 40 30 20 10 0
Both Output Loaded
250 200 150 100 50
0
20 40
60
80 100 120 140 160
0 1.5
2
2.5
3
3.5
Load Current (mA)
Output Voltage (V)
Quiescent Current vs Temperature
110
1.82
Output Voltage vs Temperature
VOUT =1.8V
Quiescent Current @ 5V (uA)
100
1.81
90
Output Voltage (V)
1.80
80
1.79
70
1.78
60
50 -50
1.77
0
50
100
-50
0
50
100
Temperature
(o C)
Temperature (oC)
8
AME, Inc.
AME8750
PSRR vs. Frequency
60
Low-Dropout 150mA / 150mA Dual CMOS Regulator
Line Transient
Bypass
50
3. 5V 4 .5V 1V /DIV
No-Bypass
PSRR (dB)
40
30
20
V IN
10
0
10
100
1000
10000
100000
1000000
V out
VIN=2.9V VOUT =1.8V ILOAD =50mA
Frequency (Hz)
50s/DIV
Channel-to-Channel Isolation vs Frequency
100
Load Transient
V IN =4.3V ILOAD0 to 150mA =
20m V/DIV (AC-Coupled)
0
Channel-to-Channel Isolation (dB)
10
V o ut
VIN=5V R LOAD=50
1 0.01 0.1 1 10 100
10s/DIV
Frequency (KHz)
Output Noise Spectral Density vs Frequency
100
Load Transient Near Dropout
Noise Density (V / OHz)
Bypass
10
V IN= V OUT+0.1V
No-Bypass
1 0.01
0.1
1
10
100
0
Frequency (KHz)
10s/ DIV
100m A/DIV
ILOA D
20mV/DIV (AC-Coupled)
VIN =3.6V VOUT =1.8V R LOAD =50
V O UT
100m A/DIV
I
LO AD
20m V/DIV (AC-Couple d)
9
AME, Inc.
AME8750
Shutdown Response
Output Voltage (1V/DIV)
Low-Dropout 150mA / 150mA Dual CMOS Regulator
Shutdown Voltage (1V/DIV)
0
0 RLOAD =100[
10
AME, Inc.
AME8750
n Date Code Rule
Marking A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Date Code W W W W W W W W W W W W W W W W W W W W Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9
Low-Dropout 150mA / 150mA Dual CMOS Regulator
n Tape & Reel Dimension
SOT-26
P
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SOT-26 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
11
AME, Inc.
AME8750
n Tape & Reel Dimension
TSOT-26
P
Low-Dropout 150mA / 150mA Dual CMOS Regulator
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package TSOT-26 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
12
AME, Inc.
AME8750
n Package Dimension
SOT-26
Top View D e Side View
Low-Dropout 150mA / 150mA Dual CMOS Regulator
SYMBOLS
L
MILLIMETERS MIN MAX
INCHES MIN MAX
A A1
H E
1.20REF 0.00 0.30 2.70 1.40 0.15 0.55 3.10 1.80
0.0472REF 0.0000 0.0118 0.1063 0.0551 0.0059 0.0217 0.1220 0.0709
b D
c1 S1
E e H L 1
1.90 BSC 2.60 3.00
0.0748 BSC 0.10236 0.11811 0.0146REF
o
0.37REF 0
o
Front View A
10
0o
10o
S1
0.95REF
0.0374REF
b
TSOT-26
Top View D e Side View
A1
SYMBOLS
L
MILLIMETERS MIN MAX
1.25 0.50 0.25 3.10 1.80
INCHES MIN
0.0354 0.0118 0.0035 0.1063 0.0551
MAX
0.0492 0.0197 0.0098 0.1220 0.0709
A+A1 b
H E
0.90 0.30 0.09 2.70 1.40
c D
c1 S1
E e H L
1.90 BSC 2.40 3.00
0.07480 BSC 0.09449 0.11811 0.0138BSC
o
Front View A
0.35BSC 0
o
1 S1
10
0
o
10
o
0.95BSC
0.0374BSC
b
A1
13
www.ame.com.tw
E-Mail: sales@ame.com.tw
Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, 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) AME, Inc. , January 2006 Document: 2075-DS8750-B.01
Corporate Headquarter
AME, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989
U.S.A. (Subsidiary)
Analog Microelectronics, Inc.
3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489

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