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MIC49150WR

P1-P3P4-P6P7-P9P10-P12P13-P13
MIC49150
1.5A Low Voltage LDO Regulator
w/Dual Input Voltages
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
November 2006
1
M9999-111306
General Description
The MIC49150 is a high-bandwidth, low-dropout, 1.5A volt-
age regulator ideal for powering core voltages of low-
power microprocessors. The MIC49150 implements a dual
supply configuration allowing for very low output
impedance and very fast transient response.
The MIC49150 requires a bias input supply and a main
input supply, allowing for ultra-low input voltages on the
main supply rail. The input supply operates from 1.4V to
6.5V and the bias supply requires between 3V and 6.5V
for proper operation. The MIC49150 offers fixed output
voltages from 0.9V to 1.8V and adjustable output voltages
down to 0.9V.
The MIC49150 requires a minimum of output capacitance
for stability, working optimally with small ceramic
capacitors.
The MIC49150 is available in an 8-pin power MSOP pack-
age and a 5-pin S-Pak. Its operating temperature range is
–40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Input Voltage Range:
– V
IN
: 1.4V to 6.5V
– V
BIAS
: 3.0V to 6.5V
• Stable with 1µF ceramic capacitor
• ±1% initial tolerance
• Maximum dropout voltage (V
IN
–V
OUT
) of 500mV
over temperature
• Adjustable output voltage down to 0.9V
• Ultra fast transient response (Up to 10MHz bandwidth)
• Excellent line and load regulation specifications
• Logic controlled shutdown option
• Thermal shutdown and current limit protection
• Power MSOP-8 and S-Pak packages
• Junction temperature range: –40°C to 125°C
Applications
• Graphics processors
• PC add-in cards
• Microprocessor core voltage supply
• Low voltage digital ICs
• High efficiency linear power supplies
• SMPS post regulators
Typical Application
MIC49150B
R
GND
C
OUT
= 1µF
Ceramic
BIAS
IN OUT
C
BIAS
= 1µF
Ceramic
V
OUT
= 1.0VV
IN
= 1.8V
V
BIAS
= 3.3V
ADJ
C
IN
= 1µF
Ceramic
R1
R2
Low Voltage,
Fast Transient Response Regulator
Micrel, Inc. MIC49150
November 2006
2
M9999-111306
Ordering Information
Part Number
Standard
Pb-Free /
RoHS Compliant
Output
Current
Voltage
Junction
Temp. Range
Package
MIC49150-0.9BMM MIC49150-0.9YMM 1.5A 0.9V –40° to +125°C 8-Pin Power MSOP
MIC49150-1.2BMM MIC49150-1.2YMM 1.5A 1.2V –40° to +125°C 8-Pin Power MSOP
MIC49150-1.5BMM MIC49150-1.5YMM 1.5A 1.5V –40° to +125°C 8-Pin Power MSOP
MIC49150-1.8BMM MIC49150-1.8YMM 1.5A 1.8V –40° to +125°C 8-Pin Power MSOP
MIC49150BMM MIC49150YMM 1.5A Adj. –40° to +125°C 8-Pin Power MSOP
MIC49150-0.9BR MIC49150-0.9WR* 1.5A 0.9V –40° to +125°C 5-Pin S-PAK
MIC49150-1.2BR MIC49150-1.2WR* 1.5A 1.2V –40° to +125°C 5-Pin S-PAK
MIC49150-1.5BR MIC49150-1.5WR* 1.5A 1.5V –40° to +125°C 5-Pin S-PAK
MIC49150-1.8BR MIC49150-1.8WR* 1.5A 1.8V –40° to +125°C 5-Pin S-PAK
MIC49150BR MIC49150WR* 1.5A Adj. –40° to +125°C 5-Pin S-PAK
* RoHS Compliant with ‘high-melting solder’ exemption.
Pin Configuration
1
2
3
4
8
7
6
5
GND
GND
GND
GND
EN/ADJ.
VBIAS
VIN
VOUT
TAB
5
VOUT
4
VBIAS
3
2
VIN
1 EN/ADJ
.
GND
8-Pin Power MSPO (MM) 5-Pin S-Pak (R)
Pin Description
Pin Number
8-MSOP
Pin Number
5-SPak
Pin Name Pin Name
EN
Enable (Input): CMOS compatible input. Logic high = enable,
logic low = shutdown.
1 1
ADJ
Adjustable regulator feedback input. Connect to resistor
voltage divider.
2 2 VBIAS
Input Bias Voltage for powering all circuitry on the regulator
with the exception of the output power device.
3 4 VIN
Input voltage which supplies current to the output power
device.
4 5 OUT Regulator Output.
5/6/7/8 3 GND Ground (TAB is connected to ground on S-Pak).
Micrel, Inc. MIC49150
November 2006
3
M9999-111306
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
).........................................................8V
Bias Supply Voltage (V
BIAS
)..............................................8V
Enable Input Voltage (V
EN
)...............................................8V
Power Dissipation .....................................Internally Limited
ESD Rating
(3)
.................................................................. 4kV
Operating Ratings
(2)
Supply Voltage (V
IN
)......................................... 1.4V to 6.5V
Bias Supply Voltage (V
BIAS
)................................. 3V to 6.5V
Enable Input Voltage (V
EN
).................................. 0V to 6.5V
Junction Temperature (T
J
) ..................–40°C T
J
+125°C
Package Thermal Resistance
MSOP-8 (θ
JA
).....................................................80°C/W
S-Pak (θ
JC
) ..........................................................2°C/W
Electrical Characteristics
(4)
T
A
= 25°C with V
BIAS
= V
OUT
+ 2.1V; V
IN
= V
OUT
+ 1V; bold values indicate –40°C< T
J
< +125°C, unless noted
(5)
.
Parameter Condition Min Typ Max Units
Output Voltage Accuracy
At 25°C
Over temperature range
–1
–2
+1
+2
%
%
Line Regulation V
IN
= V
OUT
+1V to 6.5V
–0.1
0.01
+0.1
%/V
Load Regulation I
L
= 0mA to 1.5A 0.2
1
1.5
%
%
Dropout Voltage (V
IN
- V
OUT
)
I
L
= 750mA
I
L
= 1.5A
130
280
200
300
400
500
mV
mV
mV
mV
Dropout Voltage (V
BIAS
- V
OUT
),
Note 5
I
L
= 750mA
I
L
= 1.5A
1.3
1.65
1.9
2.1
V
V
V
Ground Pin Current, Note 6 I
L
= 0mA
I
L
= 1.5A
15
15
25
30
mA
mA
mA
Ground Pin Current in
Shutdown
V
EN
0.6V, (I
BIAS
+ I
CC
), Note 7
0.5
1
2
µA
µA
Current thru V
BIAS
I
L
= 0mA
I
L
= 1.5A
9
32
15
25
mA
mA
mA
Current Limit MIC49150 1.6 2.3
3.4
4
A
A
Enable Input (Note 7)
Enable Input Threshold
(Fixed Voltage only)
Regulator enable
Regulator shutdown
1.6
0.6
V
V
Enable Pin Input Current Independent of state 0.1 1 µA
Reference
Reference Voltage
0.891
0.882
0.9
0.909
0.918
V
V
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
4. Specification for packaged product only.
5. For V
OUT
1V, V
BIAS
dropout specification does not apply due to a minimum 3V V
BIAS
input.
6. I
GND
= I
BIAS
+ (I
IN
– I
OUT
). At high loads, input current on V
IN
will be less than the output current, due to drive current being supplied by V
BIAS
.
7. Fixed output voltage versions only.
P1-P3P4-P6P7-P9P10-P12P13-P13

MIC49150WR

Mfr. #:
Buy MIC49150WR
Manufacturer:
Microchip Technology / Micrel
Description:
LDO Voltage Regulators Dual Supply, LV 1.5A LDO
Lifecycle:
New from this manufacturer.
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