MICREL MIC39150-2.5BT, MIC39150-2.5BU, MIC39150-1.8BU, MIC39151-2.5BU, MIC39151-2.5BT Datasheet
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MIC39150/39151 Micrel
MIC39151-2.5
IN OUT
GND
10µF
tantalum
V
IN
3.3V
V
OUT
2.5V
EN FLG
ERROR FLAG
OUTPUT
ENABLE
SHUTDOWN
100kΩ
MIC39150/39151
1.5A Low-Voltage Low-Dropout Regulator
General Description
The MIC39150 and MIC39151 are 1.5A low-dropout linear
voltage regulators that provide a low voltage, high current
output with a minimum of external components. Utilizing
Micrel’s proprietary Super βeta PNP™ pass element, the
MIC39150/1 offers extremely low dropout (typically 375mV at
1.5A) and low ground current (typically 17mA at 1.5A).
The MIC39150/1 is ideal for PC add-in cards that need to
convert from 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed
maximum dropout voltage of 500mV over all operating conditions allows the MIC39150/1 to provide 2.5V from a supply
as low as 3V or 1.8V from a supply as low as 2.3V. The
MIC39150/1 also has fast transient response for heavy
switching applications. This device requires only 10µF of
output capacitance to maintain stability and achieve fast
transient response
The MIC39150/1 is fully protected with overcurrent limiting,
thermal shutdown, reversed-battery protection, reversedlead insertion, and reverse-leakage protection. The MIC39151
offers a TTL-logic compatible enable pin and an error flag that
indicates undervoltage and over current conditions. Offered
in fixed voltages of 2.5V and 1.8V, the MIC39150/1 comes in
the TO-220 and TO-263 packages and is an ideal upgrade to
older, NPN-based linear voltage regulators.
Features
• 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5 to 1.8V conversion
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery and reversed lead insertion protection
• Reversed-leakage protection
• Fast transient response
• TO-263 and TO-220 packaging
• TTL/CMOS compatible enable pin (MIC39151 only)
• Error flag output (MIC39151 only)
Applications
• Low-voltage digital ICs
• LDO linear regulator for PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Low-voltage microcontrollers
• StrongARM™ processor supply
For applications requiring input voltage greater than 16V or
automotive load dump protection, see the MIC29150/1/2/3
family.
Typical Application
MIC39150-2.5
V
IN OUT
IN
3.3V
GND
MIC39150
StrongARM is a trademark of Advanced RSIC Machines, Ltd.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
May 2000 1 MIC39150/39151
V
OUT
2.5V
10µF
tantalum
MIC39151
MIC39150/39151 Micrel
Ordering Information
Part Number Voltage Temperature Range Package
MIC39150-1.8BT 1.8V –40°C to +125°C 3-lead TO-220
MIC39150-1.8BU 1.8V –40°C to +125°C 3-lead TO-263
MIC39151-1.8BT 1.8V –40°C to +125°C 5-lead TO-220
MIC39151-1.8BU 1.8V –40°C to +125°C 5-lead TO-263
MIC39150-2.5BT 2.5V –40°C to +125°C 3-lead TO-220
MIC39150-2.5BU 2.5V –40°C to +125°C 3-lead TO-263
MIC39151-2.5BT 2.5V –40°C to +125°C 5-lead TO-220
MIC39151-2.5BU 2.5V –40°C to +125°C 5-lead TO-263
* order note & V
Pin Configuration
3 OUT
TAB
MIC39150-x.xBT
TO-220-3 (T)
TAB
MIC39151-x.xBT
TO-220-5 (T)
2 GND
1IN
5 FLG
4 OUT
3 GND
2IN
1EN
TAB
MIC39150-x.xBU
TO-263-3 (U)
TAB
MIC39151-x.xBU
TO-263-5 (U)
Pin Description
Pin Number Pin Number Pin Name Pin Function
MIC39150 MIC39151
1 EN Enable (Input): TTL/CMOS compatible input. Logic high = enable; logic low
or open = shutdown
1 2 IN Unregulated Input: +16V maximum supply.
2, TAB 3, TAB GND Ground: Ground pin and TAB are internally connected.
3 4 OUT Regulator Output
5 FLG Error Flag (Ouput): Open-collector output. Active low indicates an output
fault condition.
3 OUT
2 GND
1IN
5 FLG
4 OUT
3 GND
2IN
1EN
MIC39150/39151 2 May 2000
MIC39150/39151 Micrel
Absolute Maximum Ratings (Note 1)
Supply Voltage (V
Enable Voltage (V
Storage Temperature (T
Lead Temperature (soldering, 5 sec.) ....................... 260°C
ESD, Note 3
) ..................................... –20V to +20V
IN
) ..................................................+20V
EN
) ....................... –65°C to +150°C
S
Operating Ratings (Note 2)
Supply Voltage (V
Enable Voltage (V
Maximum Power Dissipation (P
Junction Temperature (TJ) ....................... –40°C to +125°C
Package Thermal Resistance
TO-263 (θ
TO-220 (θ
JC
JC
) .................................. +2.25V to +16V
IN
) ..................................................+16V
EN
)..................... Note 4
D(max)
) .........................................................2°C/W
) .........................................................2°C/W
Electrical Characteristics
VIN = V
Symbol Parameter Condition Min Typ Max Units
V
OUT
∆V
OUT
V
DO
I
GND
I
GND(do)
I
OUT(lim)
I
OUT(min)
Enable Input (MIC39151)
V
EN
I
IN
I
OUT(shdn)
Flag Output (MIC39151)
I
FLG(leak)
V
FLG(do)
V
FLG
+1V; VEN = 2.4V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted
OUT
Output Voltage 10mA –11%
10mA ≤ I
Line Regulation I
= 10mA, V
OUT
Load Regulation VIN = V
≤ 1.5A, V
OUT
OUT
+ 1V, 10mA ≤ I
OUT
+ 1V ≤ VIN ≤ 8V –22%
OUT
+ 1V ≤ VIN ≤ 16V 0.06 0.5 %
≤ 1.5A, 0.2 1 %
OUT
/∆T Output Voltage Temp. Coefficient, 20 100 ppm/°C
Note 5
Dropout Voltage, Note 6 I
Ground Current, Note 7 I
Dropout Ground Pin Current VIN ≤ V
Current Limit V
= 100mA, ∆V
OUT
I
= 750mA, ∆V
OUT
I
= 1.5A, ∆V
OUT
= 750mA, VIN = V
OUT
I
= 1.5A, VIN = V
OUT
OUT(nominal)
= 0V, VIN = V
OUT
= –1% 80 200 mV
OUT
= –1% 260 mV
OUT
= –1% 375 500 mV
OUT
+ 1V 4 20 mA
OUT
+ 1V 17 mA
OUT
– 0.5V, I
+ 1V 2.8 A
OUT
= 10mA 1.1 mA
OUT
Minimum Load Current 710mA
Enable Input Voltage logic low (off) 0.8 V
logic high (on) 2.25 V
Enable Input Current VEN = 2.25V 1 15 30 µA
75 µA
= 0.8V 2 µA
V
EN
4 µA
Shutdown Output Current Note 8 10 20 µA
Output Leakage Current VOH = 16V 0.01 1 µA
2 µA
Output Low Voltage VIN = 2.250V, IOL, = 250µA, Note 9 180 300 mV
400 mV
Low Threshold % of V
High Threshold % of V
OUT
OUT
93 %
99.2 %
Hysteresis 1%
May 2000 3 MIC39150/39151
MIC39150/39151 Micrel
Note 1. Exceeding the absolute maximum ratings may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended.
Note 4. P
Note 5. Output voltage temperature coefficient is ∆V
Note 6. V
Note 7. I
Note 8. V
Note 9. For a 2.5V device, V
= (T
D(max)
= VIN – V
DO
voltage is the input-to-output voltage differential with the minimum input voltage being 2.25V. Minimum input operating voltage is 2.25V.
is the quiescent current. IIN = I
GND
≤ 0.8V, VIN ≤ 8V, and V
EN
– TA) ÷ θJA, where θJA depends upon the printed circuit layout. See “Applications Information.”
J(max)
OUT
when V
IN
decreases to 98% of its nominal output voltage with VIN = V
OUT
+ I
GND
OUT
OUT
= 0V.
= 2.250V (device is in dropout).
OUT(worst case)
.
÷ (T
J(max)
– T
J(min)
) where T
is +125°C and T
J(max)
+ 1V. For output voltages below 2.25V, dropout
OUT
J(min)
is –40°C.
MIC39150/39151 4 May 2000
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