MAX15062 Datasheet, PDF (1/23 Pages) Maxim Integrated Products – Step-Down DC-DC Converters

MAX15062
EVALUATION KIT AVAILABLE
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
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.
Benefits 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
Typical Operating Circuit
VIN
4.5V TO
60V ^CIN
1µF
CVCC
1µF
V_IN
LX
EN/UVLO
GND
MAX15062A
V_CC
RESET
L1
33µH
MODE
V_OUT
COUT
10µF
VOUT
3.3V,
300mA
19-6685; Rev 1; 10/13