900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Maxim Integrated Semiconductor Electronic Components Datasheet

MAX20021 Datasheet

Step-Down DC-DC Converters

No Preview Available !

MAX20021/MAX20022
EVALUATION KIT AVAILABLE
Automotive Quad, Low-Voltage
Step-Down DC-DC Converters
General Description
The MAX20021/MAX20022 power-management ICs
(PMICs) integrate four low-voltage, high-efficiency, step-
down DC-DC converters. Each of the four outputs is
factory or resistor programmable between 1.0V to 4.0V
and can deliver up to 1.0A of current. The PMICs operate
from 3.0V to 5.5V, making them ideal for automotive point-
of-load and post-regulation applications.
The PMICs feature fixed-frequency PWM-mode operation
with a switching frequency of 2.2MHz or 3.2MHz. High-
frequency operation allows for an all-ceramic capacitor
design and small-size external components. The low-
resistance on-chip switches ensure high efficiency at
heavy loads while minimizing critical inductances, making
the layout a much simpler task with respect to discrete
solutions. Internal current sensing and loop compensation
reduce board space and system cost.
The PMICs offer a spread-spectrum option to reduce
radiated emissions. Two of the four buck converters oper-
ate 180º out-of-phase with the internal clock. This feature
reduces the necessary input capacitance and improves
EMI as well. All four buck converters operate in constant-
PWM mode outside the AM band. The PMICs offer a
SYNC input to synchronize to an external clock.
The PMICs provide individual enable inputs and power-
good/reset outputs, as well as factory-programmable
RESET times.
The PMICs offer several important protection features
including: input overvoltage protection, input undervoltage
monitoring, input undervoltage lockout, cycle-by-cycle
current limiting, and overtemperature shutdown. The
input undervoltage monitor indicates a brownout condition
by driving PG_ low when the input falls below the UVM
threshold.
The MAX20021/MAX20022 PMICs are available in a
28-pin TQFN package with an exposed pad and are
specified for operation over the -40ºC to +125ºC automo-
tive temperature range.
Applications
● Automotive
● Industrial
Ordering Information/Selector Guide appear at end of data
sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX20021.related.
Benefits and Features
Quad Step-Down DC-DC Converters with Integrated
FETs
Operate from 3.0V to 5.5V Supply Voltage
1.0V to 4.0V Fixed or Adjustable Output Voltage
2.2MHz (MAX20022) or 3.2MHz (MAX20021)
Switching Frequency
Four Channels Capable of Delivering Up to 1A Each
Designed to Improve Automotive EMI Performance
• Forced-PWM Operation
• Two Channels 180º Out-of-Phase
• SYNC Input
• Spread-Spectrum Option
Soft-Start and Supply Sequencing Reduces Inrush
Current
Individual Enable Inputs and Power-Good Outputs to
Simplify Sequencing
OV/UV Input-Voltage Monitoring
Overtemperature and Short-Circuit Protection
28-Pin (5mm x 5mm x 0.8mm) TQFN-EP Package
-40ºC to +125ºC Operating Temperature Range
Simplified Block Diagram
VOUT1
10kΩ
PG_
5V
VA
1µF
GND
MAX20021
CONTROL
SS OSC
4 CHANNELS
EN_
SEL
SYNC
5V
PV_
2.2µF
STEP-DOWN
PWM OUT_
1.0V TO 4.0V
UP TO
0.5A OR 1A
LX_ 1.5µH
PGND_
VOUT_
10µF
EN OUTS_
EP
19-6628; Rev 3; 8/14


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX20021 Datasheet

Step-Down DC-DC Converters

No Preview Available !

MAX20021/MAX20022
Automotive Quad, Low-Voltage
Step-Down DC-DC Converters
Absolute Maximum Ratings
PV_ to PGND_......................................................-0.3V to +6.0V
VA to GND.............................................................-0.3V to +6.0V
OUTS_, EN_, PG_, SYNC, SEL to GND.......-0.3V to VA + 0.3V
PV_ to PV_............................................................-0.3V to +0.3V
PGND_ to GND.....................................................-0.3V to +0.3V
LX_ to PGND...............................................-1.0V to PV_ + 0.3V
LX_ Continuous RMS Current...............................................2.0A
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (TA = +70ºC)
TQFN (derate 28.6mW/ºC above +70ºC)...................2285mW
ESDHB.................................................................................. ±2kV
ESDMM...............................................................................±200V
Operating Temperature Range...........................-40ºC to +125ºC
Junction Temperature....................................................... +150ºC
Storage Temperature Range..............................-65ºC to +150ºC
Lead Temperature (soldering, 10s).................................. +300ºC
Soldering Temperature (reflow)........................................ +260ºC
Package Thermal Characteristics (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θJA)...............35°C/W
Junction-to-Case Thermal Resistance (θJC)......................3°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(VA = VPV1 = VPV2 = VPV3 = VPV4 = 5.0V; TA = TJ = -40ºC to +125ºC, unless otherwise noted. Typical values are at TA = +25ºC under
normal conditions, unless otherwise noted.) (Note 2)
PARAMETER
GENERAL
Supply Voltage Range
Supply Current
Shut-Off Current
Overvoltage Threshold
Undervoltage Monitor Threshold
UVLO Threshold
PWM Switching Frequency
Spread Spectrum
SYMBOL
CONDITIONS
MIN
VPV_
IPV0
IVPSD
fSW
Df/f
Fully operational
No load, no switching,
VEN1 = VEN2 = VEN3 = VEN4 = VPV_
VEN1 = VEN2 = VEN3 =
VEN4 = VGND
Rising
TA = +25°C
TA = +125°C
Hysteresis
UVM option enabled
VPV_ falling
VPV_ hysteresis
VPV_ falling
VPV_ rising
Switching frequency = 2.2MHz
(see the Selector Guide)
Switching frequency = 3.2MHz
(see the Selector Guide)
Spread-spectrum option = enabled
(see the Selector Guide)
3.0
2.5
5.6
4.15
2.68
2.0
3.0
TYP
3.8
0.1
2
5.8
0.1
4.3
0.1
2.2
3.2
+3
MAX
5.5
5
2
6
4.45
3.0
2.4
3.4
UNIT
V
mA
µA
V
V
V
MHz
%
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX20021
Description Step-Down DC-DC Converters
Maker Maxim Integrated
Total Page 16 Pages
PDF Download

MAX20021 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 MAX20021 Step-Down DC-DC Converters
Maxim Integrated
2 MAX20022 Step-Down DC-DC Converters
Maxim Integrated





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy