Datasheet

MAX15062 60V, 300mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converters
General Description
The MAX15062 high-efficiency, high-voltage, synchronous
step-down DC-DC converter with integrated MOSFETs
operates over a 4.5V to 60V input voltage range. The
converter delivers output current up to 300mA at 3.3V
(MAX15062A), 5V (MAX15062B), and adjustable output
voltages (MAX15062C). The device operates over the
-40°C to +125°C temperature range and is available in a
compact 8-pin (2mm x 2mm) TDFN package. Simulation
models are available.
The device employs a peak-current-mode control archi-
tecture with a MODE pin that can be used to operate the
device in pulse-width modulation (PWM) or pulse-fre-
quency modulation (PFM) control schemes. PWM opera-
tion provides constant frequency operation at all loads
and is useful in applications sensitive to variable switch-
ing frequency. PFM operation disables negative inductor
current and additionally skips pulses at light loads for high
efficiency. The low-resistance on-chip MOSFETs ensure
high efficiency at full load and simplify the PCB layout.
To reduce input inrush current, the device offers an
internal soft-start. The device also incorporates an EN/
UVLO pin that allows the user to turn on the part at the
desired input-voltage level. An open-drain RESET pin can
be used for output-voltage monitoring.
Applications
● ProcessControl
● IndustrialSensors
● 4–20mACurrentLoops
● HVACandBuildingControl
● High-VoltageLDOReplacement
● General-PurposePoint-of-Load
Benets and Features
● EliminatesExternalComponentsandReduces
Total Cost
 • NoSchottky—SynchronousOperationforHigh
EfficiencyandReducedCost
 • InternalCompensation
 • InternalFeedbackDividerforFixed3.3V,5V
Output Voltages
 • InternalSoft-Start
• All-Ceramic Capacitors, Ultra-Compact Layout
● ReducesNumberofDC-DCRegulatorstoStock
• Wide4.5Vto60VInputVoltageRange
• Fixed 3.3V and 5V Output Voltage Options
• Adjustable 0.9V to 0.89 x V
IN
Output Voltage
Option
• Delivers Up to 300mA Load Current
• Configurable Between PFM and Forced-PWM
Modes
● ReducesPowerDissipation
• Peak Efficiency = 92%
• PFMFeatureforHighLight-LoadEfficiency
• Shutdown Current = 2.2µA (typ)
● OperatesReliablyinAdverseIndustrialEnvironments
• Hiccup-ModeCurrentLimitandAutoretryStartup
 • Built-InOutputVoltageMonitoringwithOpen-Drain
RESET Pin
• Programmable EN/UVLO Threshold
• Monotonic Startup into Prebiased Output
• Overtemperature Protection
• -40°Cto+125°CAutomotive/Industrial
 TemperatureRange
19-6685; Rev 1; 10/13
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX15062.related.
Typical Operating Circuit
EVALUATION KIT AVAILABLE
C
VCC
1µF
MODE
V
CC
EN/UVLO
V
IN
LX
GND
V
OUT
V
IN
4.5V TO
60V
C
IN
1µF
MAX15062A
RESET
L1
33µH
C
OUT
10µF
V
OUT
3.3V,
300mA