Control IC. MIC2150 Datasheet

MIC2150 IC. Datasheet pdf. Equivalent

MIC2150 Datasheet
Recommendation MIC2150 Datasheet
Part MIC2150
Description 2-Phase Dual Output PWM Synchronous Buck Control IC
Feature MIC2150; MIC2150/MIC2151 2-Phase Dual Output PWM Synchronous Buck Control IC General Description Features .
Manufacture Micrel Semiconductor
Datasheet
Download MIC2150 Datasheet




Micrel Semiconductor MIC2150
MIC2150/MIC2151
2-Phase Dual Output PWM Synchronous
Buck Control IC
General Description
Features
The MIC2150/1 are simple 2-phase dual-output
synchronous buck control ICs featuring small size and high
efficiency. The ICs implement PWM control at 500kHz
(MIC2150) or 300kHz (MIC2151), with the outputs
switching 180° out of phase. The result of the out-of-phase
operation is 1MHz input ripple frequency with ripple current
cancellation, minimizing the required input filter
capacitance. A 1% output voltage tolerance allows the
maximum level of system performance. Internal drivers
with adaptive gate drive allow the highest efficiency with
the minimum external components.
A dual threshold enable pin, matched soft-start pins, and a
power good output are provided, allowing a high level of
control.
Dual Synchronous Buck Control IC with outputs
switching 180 degree out-of-phase
4.5V to 14.5V input voltage range
Adjustable output voltages down to 0.7V
1% output voltage accuracy
MIC2150: 500kHz PWM operation
MIC2151: 300kHz PWM operation
Adaptive gate drive allows efficiencies over 95%
Adjustable current limit with no sense resistor
- Senses low-side MOSFET current
Internal drivers allow 20A per phase
Power Good output allow simple sequencing
The MIC2150/1 are available in the small size 4mm×4mm
24-pin MLF® package. The MIC2150/1 has a junction
operating range from –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Applications
Dual threshold enable pin
Independent programmable soft-start pins
Output over-voltage protection
Input UVLO
Works with ceramic output capacitors
Tiny 4mm×4mm 24-Pin MLF® package
Multi-output power supplies with sequencing
Junction temperature range of -40°C to +125°C
DSP, FPGA, CPU and ASIC power supplies
Telecom and Networking equipment
Servers
_________________________________________________________________________________________________________________________
Typical Application
MicroLead Frame and MLF are registered trademarks of Amkor Technology, 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
August 2009
M9999-082809-A
(408) 944-0800



Micrel Semiconductor MIC2150
Micrel, Inc.
Ordering Information
Part Number
Frequency
MIC2150YML
MIC2151YML
500kHz
300kHz
Voltage
Adj.
Adj.
Junction Temp.
Range
–40°C to +125°C
–40°C to +125°C
Lead Finish
Pb-Free
Pb-Free
MIC2150
Package
4mm×4mm 24-pin MLF®
4mm×4mm 24-pin MLF®
Pin Configuration
24-Pin MLF® (ML)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
Pin Name
BS1
HSD1
SW1
CS1
SS1
COMP1
AGND
FB1
AVDD
FB2
PGOOD
COMP2
Pin Function
Boost 1(Input): Provides voltage for high-side MOSFET driver 1. The gate drive
voltage is higher than the source voltage by VDD minus a diode drop.
High-Side Drive 1 (Output): High current output-driver for ext. high-side
MOSFET.
Switch Node 1(Output): High current output driver return for HSD1.
Current Sense 1 (Input): Current-limit comparator non-inverting input. The
current limit is sensed across the low-side FET during the ON-time. Current limit
is set by the resistor in series with the CS1 pin.
Soft-start, Output 1(Input): Controls the turn-on time of the output voltage. Active
at power-up, Enable and Current Limit recovery.
Compensation 1 (Input): Pin for external compensation, Channel 1.
Analog Ground (Signal): Signal path return for FB, EN, PGOOD, AVDD, SS and
COMP.
Feedback 1 (Input): Input to Channel 1 error amplifier. Regulates to 0.7V.
Analog Supply Voltage (Input): Connect ext. bypass capacitor.
Feedback 2 (Input): Input to Channel 2 error amplifier. Regulates to 0.7V.
Power Good (Output): Indicates Channel 1 output AND Channel 2 output > 90%
Nominal.
Compensation 2 (Input): Pin for external compensation, Channel 2.
August 2009
2 M9999-082809-A
(408) 944-0800



Micrel Semiconductor MIC2150
Micrel, Inc.
Pin Number
13
14
15
16
17
18
19
20
21
22
23
24
EPAD
MIC2150
Pin Name
SS2
CS2
SW2
HSD2
BS2
PGND2
LSD2
VDD
EN
VIN
LSD1
PGND1
EP
Pin Function
Soft-start, Output 2(Input): Controls the turn-on time of the output voltage. Active
at power-up, Enable and Current Limit recovery.
Current Limit 2 (Input): Current-limit comparator non-inverting input. The current
limit is sensed across the low-side FET during the ON time. Current limit is set
by the resistor in series with the CS2 pin.
Switch node 2 (Output): High current output driver return for HSD2.
High-Side Drive 2 (Output): High current output-driver for the high-side
MOSFET.
Boost 2 (Input): Provides voltage for high-side MOSFET driver 2. The gate drive
voltage is higher than the source voltage by VDD minus a diode drop.
Power Ground 2. High current return for low-side driver 2 & CS2.
Low-Side Drive 2 (Output): High-current driver output for external MOSFET.
5V Internal Linear Regulator from VIN (Output): VDD is the ext. MOSFET gate
drive supply voltage and an internal supply bus for the IC. When VIN is <5V, this
regulator operates in drop-out mode. Connect external bypass capacitor.
Enable (Input): Dual threshold enable pin. Logic low turns the IC off. Exceeding
lower threshold enables Channel 1, exceeding higher threshold then enables
Channel 2. The dual threshold function allows the option of power up sequencing
from a single EN pin. Both channels must be turned on and off together.
The enable pin must be driven higher than 2.8V for proper operation.
Supply voltage Channel 1 (Input): 4.5V to 14V
Low-Side Drive 1 (Output): High-current driver output for external MOSFET.
Power Ground 1: High current return for low-side driver 1 & CS1.
Exposed Pad (Power): Must make a full connection to the GND plane to
maximize thermal performance of the package.
August 2009
3 M9999-082809-A
(408) 944-0800





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