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MIC5159YM6-TR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
MIC5159
Programmable Current Limit µCap LDO
Regulator Controller
IttyBitty is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2006
M9999-062706
General Description
Micrel’s MIC5159 is a precision-voltage regulator
controller. Used with an external P-Channel MOSFET, the
MIC5159 forms a two-chip low-dropout regulator capable
of driving a wide range of output currents.
The MIC5159 operates from an input of 1.65V to 5.5V. The
low input voltage allows the MIC5159 to operate off of high
power 1.8V rails to generate lower voltages such as 1.5V.
Features of the MIC5159 include enable input and current-
limit protection. As a µCap design, the MIC5159 is stable
with ceramic output capacitors.
The MIC5159 is packaged in the IttyBitty
®
SOT-23-6, and
is offered in fixed and adjustable output voltages. Junction
temperature range of the MIC5159 is from –40°C to
+125°C.
Features
• Fast transient response
• Input voltage range: V
IN
1.65V to 5.5V
• ±1.0% initial output tolerance
• Fixed 1.8V or adjustable output voltage down to 1.25V
• Stable with ceramic output capacitor
• Capable up to 10A
• Excellent line and load regulation specifications
• Logic-controlled shutdown
• Programmable current limit
• Current-limit protection
• IttyBitty
®
SOT-23-6 package
• Available temperature range:–40°C to +125°C
•
Applications
• Ultra-high current, ultra-low dropout voltage regulator
• High-efficiency linear power supplies
• Low-voltage distributed power
• Fixed telecom
• Multimedia and PC power supplies
• Battery chargers
• Low-voltage DSP, microprocessor and microcontroller
power supplies
Typical Application
GATE
EN
FB
V
IN
IN
IS
V
OUT
GND
U1 MIC5159BM6/YM6
Q1–Q4
SUB15P01–52 × 4
R1
5
1
3
GND
C1
R2
GND
C1 C1
Adjustable Output Voltage
V
IN
= 3.3V
V
OUT
= 2.5V
C
OUT
= 200µF
10A
100mA
Micrel, Inc. MIC5159
June 2006
2
M9999-062706
Ordering Information
Part Number
Standard Pb-Free
Marking Voltage*
Junction
Temp. Range
Package
MIC5159BM6 MIC5159YM6 LZAA Adj. –40° to +125°C SOT-23-6
MIC5159-1.8BM6 MIC5159-1.8YM6 LZ18 1.8V. –40° to +125°C SOT-23-6
MIC5159-3.0BM6 MIC5159-3.0YM6 LZ30 3.0V –40° to +125°C SOT-23-6
Note:
Other Voltage available. Contact Micrel for details.
Pin Configuration
IN GND
GATE
IS
13
46
ADJ
LZAA
5
EN
2
Pin 1
Index
IN GND
GATE
IS
13
46
OUT
LZxx
5
EN
2
Pin 1
Index
SOT-23-6 (M6)
Adjustable Voltage Version
SOT-23-6 (M6)
Fixed Voltage Version
Pin Description
Pin Number Pin Name Pin Function
1 IN Input Voltage.
2 GND Ground.
3 IS Current Sense: IS must be tied to VIN pin if the current limit feature is not used.
4 GATE Gate drive of the external P-Channel MOSFET.
5 EN Enable Input: Logic Level ON/OFF control. Logic high = ON; logic low = OFF.
ADJ Adjustable Regulator Feedback Input: Connect to resistor voltage divider.
6
OUT
Output Voltage: Connect to drain of P-Channel MOSFET to regulate output to
proper voltage.
Micrel, Inc. MIC5159
June 2006
3
M9999-062706
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
)....................................................+6.0V
Enable Input Voltage (V
EN
)..........................................+6.0V
Power Dissipation (P
D(max)
) ........................................ Note 3
Storage Temperature (T
s
) .........................–65°C to +150°C
Lead Temperature (soldering, 5 sec.)........................ 260°C
EDS Rating
(4)
.................................................................. 2kV
Operating Ratings
(2)
Supply voltage (V
IN
) ................................... +1.65V to +5.5V
Enable Input Voltage (V
EN
)................................ 0V to +5.5V
Junction Temperature (T
J
) ..................–40°C T
J
+125°C
Package Thermal Resistance
SOT-23-6 (
JA
).................................................235°C/W
Electrical Characteristics
(5)
T
A
= 25°C with V
IN
= V
OUT
+ 1V; V
EN
= 1.2V, C
IN
= C
OUT
= 10µF, ceramic, I
OUT
= 10mA; bold values indicate –40°C < T
J
< +125°C;
unless otherwise specified, Note 3
Parameter Condition Min Typ Max Units
At 25°C –1 +1 % Output Voltage Accuracy
Over temperature range
–2 +2
%
Output Voltage Line Regulation V
IN
= V
OUT
+ 1.0V to 5.5V –0.1 0.007 +0.1 %/V
Output Voltage Load Regulation I
L
= 10mA to 1.0A 0.2 1.0 %
V
EN
0.2V (MIC5159 OFF) 15
30
µA
Ground Pin Current
(6)
V
EN
1.2V (MIC5159 ON) 10 20 mA
Adjust Pin Bias Current 1 µA
(PFET fully ON); V
IN
= 5.0V 4.5 V
(PFET fully ON); V
IN
= 3.3V 3.1 V
Maximum V
GS
(PFET fully ON); V
IN
= 2.5V 2.3 V
Current-Limit Threshold V
IN
– V
IS
40 50 65 mV
Start-up Time V
EN
= V
IN
30
150
µs
Enable Input
Regulator enabled
1.2
V
Regulator shutdown
0.2
V
Enable Input Threshold
Enable hysteresis
20
50
250
mV
Independent of state 0.01 nA Enable Pin Input Current
1 µA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. P
D(max)
= (T
J(max)
– TA) ÷
JA
, where
JA
depends upon the printed circuit layout, see “Applications Information.”
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
6. I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT
.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23

MIC5159YM6-TR

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LDO Voltage Controllers Progr. Ilim LDO Controller
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