EVALUATION KIT AVAILABLE
MAXM17761
4.5V to 76V,1A High-Efficiency DC-DC Step-Down
Power Module with Integrated Inductor
General Description
The
Himalaya
series of voltage regulator ICs and Power
Modules enable cooler, smaller, and simpler power supply
solutions. The MAXM17761 is an easy-to-use power
module that combines a synchronous step down DC-DC
converter with integrated FETs ,a fully shielded inductor,
and the compensation components into a low-profile,
thermally-efficient, system-in-package (SiP). The device
operates over a wide input voltage range of 4.5V to 76V
and delivers up to 1A continuous output current with
excellent line and load regulation over an output voltage
range of 0.8V to 5V. The device only requires five exter-
nal components to complete the total power solution.
The high level of integration significantly reduces design
complexity, manufacturing risks, and offers a true plug-
and-play power supply solution, reducing time-to-market.
The device offers resistor programmable switching fre-
quency,
RESET
output voltage monitoring, adjustable
input undervoltage lockout and programmable soft-start.
The device also features robust overload protection and
a thermal shutdown function.
The MAXM17761 is available in a low-profile, highly
thermal-emissive, compact, 28-pin 6.5mm x 10mm x
2.92mm SiP package that reduces power dissipation in
the package and enhances efficiency. The package is
easily soldered onto a printed circuit board and is suitable
for automated circuit board assembly. The device can
operate over the full industrial temperature range from
-40°C to +125°C.
Benefits and Features
●
Reduces Design Complexity, Manufacturing Risks,
and Time-to-Market
• Synchronous Step-Down DC-DC Converter With
Integrated FETs
• Integrated Inductor
• Integrated Compensation Components
● Saves Board Space in Space-Constrained Applications
• Complete Integrated Step-Down Power Supply in a
Single Package
•
Small Profile 6.5mm x 10mm x 2.92mm SiP Package
•
Simplified PCB Design with Minimal External BOM
Components
● Offers Flexibility for Power-Design Optimization
• Wide Input Voltage Range from 4.5V to 76V
•
Output-Voltage Adjustable Range from 0.8V to 5V
•
Adjustable Frequency with External Synchronization
(180kHz to 537kHz)
• Soft-Start Programmable
•
Optional Programmable EN/UVLO
● Operates Reliably in Adverse Industrial Environments
• Integrated Thermal Fault Protection
•
Robust Overcurrent Protection
•
RESET
Output Voltage Monitoring
•
High Industrial -40°C to +125°C Ambient Operating
Temperature Range/-40°C to +150°C Junction
Temperature Range
Typical Application Circuit
V
IN
C1
2.2µF
IN
OUT
3.3V,1A
R1
69.8kΩ
EN/UVLO
R2
105kΩ
RT/SYNC
FB
FB_R
ILIM
C2
100µF
Applications
●
Industrial Power Supplies
●
Distributed Supply Regulation
●
FPGA and DSP Point-of-Load Regulator
●
Base Station Point-of-Load Regulator
●
HVAC and Building Control
MAXM17761
SS
SS_C
RESET
SGND
V
CC
LX
EXTVCC
PGND
R3
243kΩ
Ordering Information
appears at end of data sheet.
19-100085; Rev 1; 9/17
MAXM17761
4.5V to 76V,1A High-Efficiency DC-DC Step-Down
Power Module with Integrated Inductor
Absolute Maximum Ratings (Note 1)
IN to SGND
...........................................................-0.3V
to +80V
LX to PGND.................................................. -0.3V to V
IN
+ 0.3V
OUT to PGND (V
IN
< 6.3V)
..........................
-0.3V to V
IN
+ 0.3V
OUT to PGND (V
IN
> 6.3V)
..................................-0.3V
to +6.3V
EN/UVLO, EXTVCC to SGND
..............................-0.3V
to +26V
FB, FB_R,
RESET,
SS, SS_C, V
CC
,
RT, ILIM to SGND
................................................-0.3V
to +6V
PGND to SGND
....................................................-0.3V
to +0.3V
Operating Temperature Range
......................... -40°C to +125°C
Junction Temperature
......................................................+150°C
Storage Temperature Range ............................ -55°C to +125°C
Lead Temperature (soldering, 10s) ................................. +250°C
Soldering Temperature (reflow) .......................................+250°C
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.
Package Information
PACKAGE TYPE: 28PIN-SiP
Package Code
Outline Number
Land Pattern Number
Junction-to-Ambient Thermal Resistance (θ
JA
)
L286510#8
21-100181
90-100059
22.5°C/W
THERMAL RESISTANCE, FOUR-LAYER BOARD (Note 2)
For the latest package outline information and land patterns (footprints), go to
www.maximintegrated.com/packages.
Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Note 1:
Junction temperature greater than +125°C degrades operating lifetimes.
Note 2:
Package thermal resistance is measured on evaluation board with natural convection.
Electrical Characteristics
(V
IN
= 24V, V
EN/UVLO
= unconnected, R
RT
= 69.8 kΩ (f
SW
= 537kHz). V
PGND
, V
SGND
= 0V, V
CC
, LX, SS,
RESET,
OUT = open.
T
A
= -40°C to 125°C, unless otherwise noted. Typical values are at T
A
= +25°C. All voltages are referenced to SGND, unless otherwise
noted.) (Note 3)
PARAMETER
INPUT SUPPLY
Input Voltage Range
Input Shut-down Current
Input Quiescent Current
EN/UVLO
V
ENR
EN/UVLO Threshold
Enable Pullup Current
V
ENF
V
EN-TRUESD
I
EN
V
EN/UVLO
rising
V
EN/UVLO
falling
V
EN/UVLO
falling, true shutdown
V
EN/UVLO
= 1.215V
2.2
1.19
1.09
1.215
1.115
0.7
2.5
2.8
μA
1.24
1.14
V
V
IN
I
IN-SH
I
Q-PWM
V
EN/UVLO
= 0V (shutdown mode)
R
ILIM
= 243kΩ
4.5
2.5
3
5
4
76
10
5
V
μA
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
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