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MIC5159 Datasheet

  • MIC5159

  • Micrel Semiconductor [PROGRAMMABLE CURRENT LIMIT UCAP LDO R...

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  • MICREL   MICREL

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MIC5159
Micrel
MIC5159
Programmable Current Limit
碌
Cap LDO Regulator Controller
General Description
Micrel鈥檚 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
碌Cap
design, the MIC5159 is stable with
ceramic output capacitors.
The MIC5159 is packaged in the IttyBitty
廬
SOT-23-6, and is
offered in fixed and adjustable output voltages. Junction
temperature range of the MIC5159 is from 鈥?0擄C to +125擄C.
Features
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Fast transient response
Input voltage range: V
IN
1.65V to 5.5V
鹵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
廬
SOT-23-6 package
Available temperature range: 鈥?0擄C to +125擄C
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
Applications
Ordering Information
Part Number
MIC5159BM6
MIC5159-1.8BM6
MIC5159-3.0BM6
Voltage
ADJ.
1.8V
3.0V
Marking
LZAA
LZ18
LZ30
Junction Temp. Range
鈥?0擄C to +125擄C
鈥?0擄C to +125擄C
鈥?0擄C to +125擄C
Package
SOT-23-6
SOT-23-6
SOT-23-6
Other voltages available. Contact Micrel for details.
Typical Application
Load Transient Response
V
IN
Q1脨Q4
SUB15P01脨52
麓
4
V
OUT
5
1
3
OUTPUT VOLTAGE
(100mV/div.)
U1 MIC5159BM6
10A
C1
EN
IN
IS
GATE
FB
GND
R1
C1
R2
C1
OUTPUT CURRENT
(5A/div.)
100mA
GND
GND
V
IN
= 3.3V
V
OUT
= 2.5V
C
OUT
= 200碌F
TIME (20碌s/div.)
Adjustable Output Voltage
IttyBitty is a registered trademark of Micrel, Inc.
Micrel, Inc. 鈥?1849 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel + 1 (408) 944-0800 鈥?fax + 1 (408) 944-0970 鈥?http://www.micrel.com
April 2004
1
M9999-041204

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