mic38300 Micrel Semiconductor, mic38300 Datasheet

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mic38300

Manufacturer Part Number
mic38300
Description
3a Superlnr? Low Noise High Efficiency Regulator
Manufacturer
Micrel Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
mic38300HYHL
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Part Number:
mic38300HYHL EV
Manufacturer:
Micrel Inc
Quantity:
135
Part Number:
mic38300HYHL TR
Manufacturer:
MICREL
Quantity:
4 003
General Description
The MIC38300 is a 3A peak, 2.2A continuous output
current step down converter and the first device in a new
generation of SuperLNR™ regulators providing the
benefits of LDOs in respect to ease of use, fast transient
performance, high PSRR and low noise while offering the
efficiency of a switching regulator.
As output voltages move lower, the output noise and
transient response of a switching regulator become an
increasing challenge for designers. By combining a
switcher whose output is slaved to the input of a high
performance LDO, high efficiency is achieved with a clean
low noise output. The MIC38300 is designed to provide
less than 5mV of peak to peak noise and over 70dB of
PSRR at 1kHz. Furthermore, the architecture of the
MIC38300 is optimized for fast load transients allowing to
maintain less than 30mV of output voltage deviation even
during ultra fast load steps, making the MIC38300 an ideal
choice for low voltage ASICs and other digital ICs.
The MIC38300 features a fully integrated switching
regulator and LDO combo, operates with input voltages
from 3.0V to 5.5V input and offers adjustable output
voltages down to 1.0V.
The MIC38300 is offered in the small 28-pin 4×6×0.9mm
MLF
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com
___________________________________________________________________________________________________________
Typical Application
SuperLNR is a trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademark of Amkor Technologies
February 2008
®
package and can operate from –40°C to +125°C.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
Features
Applications
408
3A Low Noise High Efficiency Regulator
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
3A peak output current
2.2A continuous operating current
Input voltage range: 3.0V to 5.5V
Adjustable output voltage down to 1.0V
Output noise less than 5mV
Ultra fast transient performance
Unique switcher plus LDO architecture
Fully integrated MOSFET switches
Micro-power shutdown
Easy upgrade from LDO as power dissipation
becomes an issue
Thermal shutdown and current limit protection
4mm × 6mm × 0.9mm MLF
Point-of-load applications
Networking, server, industrial power
Wireless base-stations
Sensitive RF applications
MIC38300
SuperLNR™
Preliminary
®
package
(408) 944-0800
M9999-022208
SuperLNR™

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mic38300 Summary of contents

Page 1

... PSRR at 1kHz. Furthermore, the architecture of the MIC38300 is optimized for fast load transients allowing to maintain less than 30mV of output voltage deviation even during ultra fast load steps, making the MIC38300 an ideal choice for low voltage ASICs and other digital ICs. The MIC38300 features a fully integrated switching regulator and LDO combo, operates with input voltages from 3 ...

Page 2

... Micrel, Inc. Block Diagram Ordering Information Part Number Current MIC38300HYHL Note: For additional voltage options, contact Micrel. February 2008 Output (1) Voltage Temperature Range 3.0A ADJ –40°C to +125°C 2 Junction Package PB-Free 28-Pin 4x6 MLF MIC38300 ® M9999-022208 (408) 944-0800 ...

Page 3

... This pin can also be used as an under-voltage lockout function by connecting a resistor divider from EN/UVLO pin to VIN and GND. It should be not left open. Power Ground ePAD 22 21 PGND PGND 20 19 PGND EN 18 MIC38300 M9999-022208 (408) 944-0800 ...

Page 4

... Micrel, Inc. February 2008 4 MIC38300 M9999-022208 (408) 944-0800 ...

Page 5

... OUTSW 2 150 15 1 0.90 100 20 0. – θ . Exceeding the maximum allowable power D(max) J(max MIC38300 ≤ +125° Max Units V 5 500 µs µ 1.025 0.5 %/V mV °C °C V 1.1 ...

Page 6

... Micrel, Inc. Typical Characteristics V = 3.3V 1.8V 10µ OUT OUT MIC38300 PSRR LDO ONLY 100 1k 10k 100k FREQUENCY (Hz) Output Voltage vs. Temperature 1.88 1.86 1.84 1.82 1.80 1. 10µF OUT 1. 10mA OUT 1. TEMPERATURE (°C) Dropout Voltage vs. Load Current 0.9 0.8 0.7 0.6 0.5 0.4 0 3.3V 0 20µ ...

Page 7

... Micrel, Inc. Functional Characteristics V = 3.3V 1.8V 10µF, Inductor = 470nH OUT OUT February 2008 = 25kΩ 100mA, unless noted LPF OUT 7 MIC38300 M9999-022208 (408) 944-0800 ...

Page 8

... For less than 5mV noise performance at higher current loads, 20µF capacitors are recommended at LDOIN and LDOOUT. Low Pass Filter Pin The MIC38300 features a Low Pass Filter (LPF) pin for adjusting the switcher frequency. By tuning the frequency, the user can further improve output ripple without losing efficiency. ...

Page 9

... Loss ⎜ ⎢ ⎝ V ⎣ OUT Efficiency loss due to DCR is minimal at light loads and gains significance as the load is increased. Inductor selection becomes a trade-off between efficiency and size in this case. 9 MIC38300 ⎤ ⎞ × ⎟ × OUT OUT ⎥ 100 ⎟ ...

Page 10

... Micrel, Inc. Package Information February 2008 28-Pin 4mm x 6mm MLF (ML) 10 MIC38300 M9999-022208 (408) 944-0800 ...

Page 11

... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully February 2008 indemnify Micrel for any damages resulting from such use or sale. © 2007 Micrel, Incorporated HMLF46T-28LD-LP-1 All units are in mm Tolerance ± 0.05 if not noted M9999-022208 (408) 944-0800 MIC38300 nt ...

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