View AME8844AEQA150Z_4148951.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

AME, Inc.
AME8844
750mA CMOS LDO
n General Description
The AME8844 family of positive, linear regulators feature low quiescent current (45A typ.) with low dropout voltage, making them ideal for battery applications. Output voltages are set at the factory and trimmed to 1.5% accuracy. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" operating conditions. An additional feature is a "Power Good" detector, which pulls low when the output is out of regulation. The AME8844 is stable with an output capacitance of 4.7F or greater.
n Functional Block Diagram
(Fixed Versions)
IN OUT
Overcurrent Shutdown
Thermal Shutdown
EN Vref x115% PG
R1
AMP
R2
n Features
l Very Low Dropout Voltage l Guaranteed 750mA Output l Accurate to within 1.5% l 45A Quiescent Current Typically l Over-Temperature Shutdown l Current Limiting l Short Circuit Current Fold-back l Noise Reduction Bypass Capacitor (Fixed Versions) l Power-Saving Shutdown Mode l Space-Saving MSOP-8 Package l 6 Factory Pre-set Output Voltages l Low Temperature Coefficient l Adjustable Version l Power Good Output Function. l All AME's Lead Free Products Meet RoHS Standards
Vref x85% Vref GND
(Adjustable Version)
IN OUT
Overcurrent Shutdown
Thermal Shutdown
AMP
R1 EN ADJ
(external)
1.242V
R2
(external)
GND
n Typical Applications
IN
IN OUT
OUT
n Applications
l Instrumentation l Portable Electronics l Wireless Devices l PC Peripherals l Battery Powered Widgets
Rev.E.01
C1 5V 1F
AME8844
PG GND EN
C3 4.7F
1
AME, Inc.
AME8844
750mA CMOS LDO
n Pin Configuration
MSOP-8 Top View
8 7 6 5
MSOP-8 Top View AME 8844AEQAxxx 1. EN 2. IN 3. PG
8 7 6 5
AME 8844BEQAADJ 1. EN 2. IN 3. ADJ
AME8844
4. OUT 5. GND 6. GND 7. GND 8. GND * Die Attach: Conductive Epoxy
AME8844
4. OUT 5. GND 6. GND 7. GND 8. GND * Die Attach: Conductive Epoxy
1
2
3
4
1
2
3
4
n Pin Description
Pin Number Pin Name AME8844AEQA AME8844BEQA Enable pin. When pulled low, the PMOS pass transistor turns off, current consuming less than 1A. Input voltage pin. It should be decoupled with 1F or greater capacitor. Feedback output voltage for adjustable device. Power-Good output. This open-drain output is low when output is out of regulation. LDO voltage regulator output pin. It should be decoupled with a 4.7F or greater value low ESR ceramic capacitor. Ground connection pin. Pin Description
1
1
EN
2 N/A 3
2 3 N/A
IN ADJ PG
4
4
OUT
5, 6, 7, 8
GND
2
Rev.E.01
AME, Inc.
AME8844
750mA CMOS LDO
n Ordering Information AME8844 x x x x xxx x
Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration
Pin Configuration
Operating Ambient Temperature Range E: -40OC to 85OC
Package Type
Number Output Voltage of Pins A: 8 ADJ: 150: 180: 250: 330: Adjustable V=1.5V V=1.8V V=2.5V V=3.3V
Special Feature
(MSOP-8)
A: 1. EN 2. IN 3. PG 4. OUT 5. GND 6. GND 7. GND 8. GND B: 1. EN 2. IN 3. ADJ 4. OUT 5. GND 6. GND 7. GND 8. GND
Q: MSOP
Z: Lead Free
(MSOP-8)
Rev.E.01
3
AME, Inc.
AME8844
750mA CMOS LDO
n Ordering Information
Part Number
AME8844AEQA150Z
Marking*
8844 Lyww 8844 Myww 8844 Myww 8844 Dyww 8844 Ayww 8844 Byww 8844 Byww
Output Voltage
1.50
Package
MSOP-8
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
AME8844AEQA180
1.80
MSOP-8
AME8844AEQA180Z
1.80
MSOP-8
AME8844AEQA250Z
2.50
MSOP-8
AME8844AEQA330Z
3.30
MSOP-8
AME8844BEQAADJ
ADJ
MSOP-8
AME8844BEQAADJZ
ADJ
MSOP-8
Note: yww represents the date code * A line on top of the first character represents lead free plating such as 8844 Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type.
4
Rev.E.01
AME, Inc.
AME8844
750mA CMOS LDO
n Absolute Maximum Ratings
Parameter
Input Voltage EN Voltage Output Voltage PG Voltage Output Current ESD Classification
Maximum
-0.3 to 8 -0.3 to 8 -0.3 to VIN + 0.3 -0.3 to VIN + 0.3 PD / (V IN - VOUT) B*
Unit
V V V V mA
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. * HBM B: 2000~3999V
n Recommended Operating Conditions
Parameter
Ambient Temperature Range Junction Temperature Range Storage Temperature Range
Symbol
TA TJ TSTG
Rating
- 40 to 85 - 40 to 125 - 65 to 150
Unit
o
C C C
o
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)** MSOP-8 Conductive Epoxy
Package
Die Attach
Symbol
JC JA PD
Maximum
100
Unit
o
C/W
206 625 150 350 mW
o o
C C
* Measure JC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F
Rev.E.01 5
AME, Inc.
AME8844
750mA CMOS LDO
n Electrical Specifications
VIN = VO(NOM) +2V, VEN = VIN, TA = 25OC unless otherwise noted
Parameter Input Voltage Output Voltage Accuracy Dropout Voltage Output Current Current Limit Short Circuit Current Quiescent Current Ground Pin Current Line Regulation Load Regulation Over Temerature Shutdown Over Temerature Hysterisis V O Temperature Coefficient ADJ Input Bias Current Minimum Load Current ADJ Reference Voltage Power Supply Rejection Symbol VIN VO VDROPOUT IO ILIM ISC IQ IGND REGLINE REGLOAD OTS OTH TC IADJ Iload V REF PSRR IO=100mA CO=4.7F ceramic f=10Hz to 100kHz IO=10mA IO=750mA Test Condition IO=1mA VO(NOM) =1.5V VO(NOM) =1.8V VO=VONOM -2.0% VO(NOM) >=2.0V VO>1.2V VO>1.2V VIN =VO(NOM) +1V, VO < 0.4V IO=0mA IO=1mA to 750mA V O < 2.0V IO=1mA 4.0 > VO >= 2.0V V IN =VO+1 to VO+2 4.0V <= VO IO=1mA to 750mA Min Note 1 -1.5 Typ Max Units V % mV mA mA mA A A % % % % C C ppm/oC A A V
o o
7 1.5 1000 See 650 chart 500
750 750 750 45 45 -0.15 -0.1 -0.4 -1 0.02 0.2 150 30 30 1 70 0.15 0.1 0.4 1
Vin = 2.5V f=1kHz f=10kHz f=100kHz Co=4.7F
70 1.221 1.240 1.26 75 55 30 30 2.0 0
dB
Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current Output Under Voltage Output Over Voltage PG Leakage Current PG Voltage Low
eN VEH V EL IEH IEL ISD VUV
VOV ILC
Vrms Vin V 0.4 V 1 A 1 A 2 A 84 %V O(NOM) %V O(NOM)
1 A
V IN =2.7V to 7V V IN =2.7V to 7V VEN =VIN, V IN =2.7V to 7V VEN =0V, VIN =2.7V to 7V VIN =5V, VO=0V, VEN VPG=7V
0.5
105
V OL
ISINK=0.25mA
0.4
V
Note1:VIN(min)=VOUT+VDROPOUT
6
Rev.E.01
AME, Inc.
AME8844
750mA CMOS LDO
n Detailed Description
The AME8844 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 140oC, or the current exceeds 2.2A. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The AME8844 behaves like a current source when the load reaches 2.2A. However, if the load impedance drops below 0.3 ohms, the current drops back to 600mA to prevent excessive power dissipation. Normal operation is restored when the load resistance exceeds 0.75 ohms.
n Enable
When EN pin is pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 2A. This pin behaves much like an electronic switch. 100K ohms resistor is necessary between VEN source and EN pin when V EN is higher than VIN.
(Note: There is no internal pull-up for EN pin. It can not be floating)
n Adjustable Version
The adjustable version uses external feedback resistors to generate an output voltage anywhere from 1.5V to 5.0V. Vadj is trimmed to 1.24V and VOUT is given by the equation:
n External Capacitors
The AME8844 is stable with an output capacitor to ground of 4.7F 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.
VOUT = Vadj ( 1 + R1 / R2 )
Feedback resistors R1 and R2 should be high enough to keep quiescent current low, but increasing R1 + R2 will reduce stability. In general, R1 and R2 in the 10's of k will produce adequate stability, given reasonable layout precautions. To improve stability characteristics, keep parasitics on the ADJ pin to a minimum, and lower R1 and R2 values.
n Power Good
The AME8844 includes the Power Good feature. When the output is not within ? 5% of the specified voltage, it pulls low. This can occur under the following conditions: 1) Input Voltage too low. 2) During Over-Temperature. 3) During Over-Current. 4) If output is pulled up.
(Note: PG pin is an open-drain output.)
Rev.E.01
7
AME, Inc.
AME8844
Dropout Voltage VS ILOAD
1.2
1
750mA CMOS LDO
Dropout Voltage VS VOUT
ILOAD=1.5A
0.8
1
VOUT=1.5
Dropout Voltage (V)
Dropout Voltage (V)
0.8
1.8 2.0
0.6
0.6
2.1
0.4
ILOAD=1.0A
0.4
2.8 3.3
ILOAD=0.5A
0.2
0.2
0 0 0.3 0.6 0.9 1.2 1.5 1.8
0 0 2 4 6 8
ILOAD (A)
VOUT (V)
Quiescent Current vs. Temperature
41 39
Ground Current vs. VIN
50 45
Quiescent Current @ 5V (uA)
37 35 33 31 29 27 25 -45 -5 25 55 85 115
Ground Current (A)
40 35 30 25 20 15 10 2 3 4 5 6 7 8
IOUT = 140mA VOUT = 1.5V
Temperature (oC)
VIN (V)
Ground Current vs. Load Current
38.5 38
VOUT vs. Temperature(2.5V)
2.500
Ground Current (A)
37 36.5 36 35.5 35 34.5 0 0.25 0.5 0.75
VIN = 2.5V VOUT = 1.5V
Output Voltage (V)
1.5
37.5
2.495
2.490
2.485
2.480
1
1.25
2.475 -45
-5
25
55
85
115
Load Current (A)
Temperature (oC)
8
Rev.E.01
AME, Inc.
AME8844
Load Regulation vs. Temperature
0.30
750mA CMOS LDO
Dropout Voltage vs. Load Current(2.5V)
400
0.25
Dropout Voltage @1.5A (mV)
350 300 250 200 150 100 50 0
Load Regulation (%)
115 oC 85 oC 55 oC 25 oC -5 oC -45 oC
0.20
0.15
0.10
0.05 0.00 -45
-5
25
55
85
115
0.3
0.6
0.9
1.2
1.5
Temperature (oC)
Load Current (A)
AME8844BEQA VADJ vs. Temperature
1.244
Line Transient Response
VOUT (50mV/DIV)
1.243 1.242 1.241 1.240 1.239
VADJ (V)
1.237 1.236 1.235
VIN (2V/DIV)
1.238
CIN = 4.7F COUT = 4.7F TR = TF = 1S VOUT = 1.5V
-45
-5
25
55
85
115
0 Time (20mS/DIV)
Temperature ( oC)
Load Step 40mA to 1.5A
ILoad 1A/DIV
Current Limit Response
VOUT 1V/DIV VIN = 5V CIN = 4.7F COUT = 4.7F
0 CIN = 4.7F COUT = 4.7F VIN = 4.0V VOUT = 1.8V
VOUT 10mV/DIV
0V ILOAD 1A/DIV ILIM ISC 0A
Time 500S/DIV
Time 1mS/DIV
Rev.E.01
9
AME, Inc.
AME8844
Current Limit vs. VIN
3 2.8 2.6
750mA CMOS LDO
Short Circuit Current vs. VIN
1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0
Current Limit (A)
2.4 2.2 2 1.8 1.6 1.4 1.2 1 2
Short Circuit Current (A)
CIN = 4.7F COUT = 4.7F VOUT = 1.8V
CIN = 4.7F COUT = 4.7F
3
4
5
6
7
8
2
3
4
5
6
7
8
VIN (V)
VIN (V)
Overtemperature Shutdown
10000
Stability vs. ESR vs. ILoad
Unstable Region
1000
IOUT 1A/DIV
100
CL=5F
0A VIN = 4V CIN = 4.7F COUT = 4.7F
CLESR ( )
10
VOUT 1V/DIV
1
Stable Region
0V
0.1
0.01 0 250
Untested Region
500 750 1000 1250 1500
Time 100mS/DIV
ILOAD (mA)
Stability vs. ESR vs. ILoad
10000
Stability vs. ESR vs. ILoad
Unstable Region
1000 100
10000
Unstable Region
1000
100
CL=2F
CLESR ( )
CL=10F
10 1 0.1 0.01
CLESR ( )
10
1
Stable Region
Stable Region
0.1 0.01 0
Untested Region
250 500 750 1000 1250 1500
Untested Region
0.001 0 250 500 750 1000 1250 1500
ILOAD (mA)
ILOAD (mA)
10
Rev.E.01
AME, Inc.
AME8844
750mA CMOS LDO
n External Resistor Divider Table
R1 (K Ohm) 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 20.67 11.27 7.75 5.90 4.77 4.00 3.44 3.02 2.70 2.43 2.21 2.03 1.88 1.75 1.63 1.53 1.44 1.36 1.29 1.23 1.17 1.12 1.07 1.02 0.98 0.95 0.91 0.88 0.85 0.82 0.79 0.77 0.75 0.73 0.70 0.69 0.67 1 2 5 10 20
R2(kohm)=(1.24*R1(kohm))/(Vout-1.24) 41.33 22.55 15.50 11.81 9.54 8.00 6.89 6.05 5.39 4.86 4.43 4.07 3.76 3.49 3.26 3.06 2.88 2.73 2.58 2.46 2.34 2.23 2.14 2.05 1.97 1.89 1.82 1.76 1.70 1.64 1.59 1.54 1.49 1.45 1.41 1.37 1.33 103.33 56.36 38.75 29.52 23.85 20.00 17.22 15.12 13.48 12.16 11.07 10.16 9.39 8.73 8.16 7.65 7.21 6.81 6.46 6.14 5.85 5.59 5.34 5.12 4.92 4.73 4.56 4.40 4.25 4.11 3.97 3.85 3.73 3.63 3.52 3.43 3.33 206.67 112.73 77.50 59.05 47.69 40.00 34.44 30.24 26.96 24.31 22.14 20.33 18.79 17.46 16.32 15.31 14.42 13.63 12.92 12.28 11.70 11.17 10.69 10.25 9.84 9.47 9.12 8.79 8.49 8.21 7.95 7.70 7.47 7.25 7.05 6.85 6.67 413.33 225.45 155.00 118.10 95.38 80.00 68.89 60.49 53.91 48.63 44.29 40.66 37.58 34.93 32.63 30.62 28.84 27.25 25.83 24.55 23.40 22.34 21.38 20.50 19.68 18.93 18.24 17.59 16.99 16.42 15.90 15.40 14.94 14.50 14.09 13.70 13.33
Rev.E.01
11
AME, Inc.
AME8844
750mA CMOS LDO
n External Resistor Divider Table (contd.)
R1 (K Ohm) 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 0.65 0.63 0.62 0.60 0.59 0.57 0.56 0.55 0.54 0.53 0.51 0.50 0.49 0.48 0.48 0.47 0.46 0.45 0.44 0.43 0.43 0.42 0.41 0.41 0.40 0.39 0.39 0.38 0.37 0.37 0.36 0.36 0.35 0.35 0.34 0.34 0.33 0.33 1 2 5 10 20
R2(kohm)=(1.242*R1(kohm))/(Vout-1.242) 1.30 1.27 1.23 1.20 1.18 1.15 1.12 1.10 1.07 1.05 1.03 1.01 0.99 0.97 0.95 0.93 0.92 0.90 0.88 0.87 0.85 0.84 0.82 0.81 0.80 0.78 0.77 0.76 0.75 0.74 0.73 0.72 0.71 0.70 0.69 0.68 0.67 0.66 3.25 3.16 3.08 3.01 2.94 2.87 2.81 2.74 2.68 2.63 2.57 2.52 2.47 2.42 2.38 2.33 2.29 2.25 2.21 2.17 2.13 2.09 2.06 2.03 1.99 1.96 1.93 1.90 1.87 1.85 1.82 1.79 1.77 1.74 1.72 1.69 1.67 1.65 6.49 6.33 6.17 6.02 5.88 5.74 5.61 5.49 5.37 5.25 5.15 5.04 4.94 4.84 4.75 4.66 4.58 4.49 4.41 4.34 4.26 4.19 4.12 4.05 3.99 3.92 3.86 3.80 3.75 3.69 3.64 3.58 3.53 3.48 3.43 3.39 3.34 3.30 12.98 12.65 12.34 12.04 11.75 11.48 11.22 10.97 10.74 10.51 10.29 10.08 9.88 9.69 9.50 9.32 9.15 8.99 8.83 8.67 8.52 8.38 8.24 8.10 7.97 7.85 7.73 7.61 7.49 7.38 7.27 7.17 7.07 6.97 6.87 6.78 6.68 6.60
Note: Small load(greater than 2 mA) is necessary as R1 or R2 is larger than 50 K Ohm. Otherwise, outputvoltage probably cannot be pulled down to 0 V on disable mode.
12
Rev.E.01
AME, Inc.
AME8844
750mA CMOS LDO
n Tape and Reel Dimension
MSOP-8
P
PIN 1 W
AME AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package MSOP-8 Carrier Width (W) 12.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 4000pcs Reel Size 3301 mm
Rev.E.01
AME 13
AME
AME, Inc.
AME8844
750mA CMOS LDO
n Package Dimension
MSOP-8
Top View D e1
TOP PKG.
SYMBOLS
DETAIL A
MILLIMETERS MIN MAX
1.07 0.20 0.92 0.38 0.33 0.23 0.17 3.10 4.98 3.10
INCHES MIN
0.002 0.032 0.011 0.011 0.005 0.005 0.114 0.188 0.114
MAX
0.04197 0.008 0.036 0.015 0.013 0.009 0.006 0.122 0.196 0.122
A A1 A2 b b1 c c1 D E E1 e e1 L
0.05 0.81 0.28 0.28 0.13 0.13 2.90 4.77 2.90
BTM PKG.
E1
E
L2 L L1
c
PIN 1 I.D (SHINNY SURFACE)
0.65 TYP 1.95 TYP 0.406 0.686
0.0255 TYP 0.0767 TYP 0.01598 0.02701 0.037 REF 0.010 TYP
o
Front View
R0.127(0.005) TYP ALL CORNER & EDGES
L1 L2
0.94 REF 0.254 TYP 0
o
A
A2 A1 e b
8
0o
8o
End View
SECTION B-B b b1
BASE METAL
B B E1
See Detail A
c
c1
WITH PLATING
NOTE: 1. Controlling dimension : Millimeter, converted inchdimension are not necessarily exact. 2. Dimensiioning and tolerancing per ansi Y14.5m-1994. 3. Dimension "d" does not include mold flash,protrusion or gate burr, mold flash,protrusion and gate burr shall not exceed 0.15mm(0.006") per side. Dimension e1 do not include inter-lead flash or protrusion, inter-lead flash and protrusion shall not exceed 0.15mm(0.006") per side. 4. The package top be smaller than the package bottom. Dimension d and e1 are determined at outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mismatch between the top and bottom of the plastic body. 5. Dimension 'b' does not include dambar protrusion. Allowable dambar protrusion shall be 0.08mm(0.0031) total in excess of the "b" dimension at maximum material condition.
14
Rev.E.01
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 2007 Document: 2013-DS8844-E.01
Corporate Headquarter
AME, Inc.
2F, 302 Rui-Guang Road, Nei-Hu Dist. 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. 95054-2438 Tel : (408) 988-2388 Fax: (408) 988-2489

▲Up To Search▲

Price & Availability of AME8844AEQA150Z

	To Download AME8844AEQA150Z Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .