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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX17024 Datasheet

Single Quick-PWM Step-Down Controller

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MAX17024
EVALUATION KIT AVAILABLE
Single Quick-PWM Step-Down
Controller with Dynamic REFIN
General Description
The MAX17024 pulse-width modulation (PWM) controller
provides high efficiency, excellent transient response, and
high DC-output accuracy needed for stepping down high-
voltage batteries to generate low-voltage core or chipset/
RAM bias supplies in notebook computers. The output
voltage can be controlled using the dynamic REFIN,
which supports input voltages between 0 to 2V. The
REFIN adjustability combined with a resistive voltage-
divider on the feedback input allows the MAX17024 to be
configured for any output voltage between 0 to 0.9 x VIN.
Maxim’s proprietary Quick-PWM™ quick-response, con-
stant-on-time PWM control scheme handles wide input/
output voltage ratios (low-duty-cycle applications) with
ease and provides 100ns “instant-on” response to load
transients while maintaining a relatively constant switch-
ing frequency. Strong drivers allow the MAX17024 to effi-
ciently drive large synchronous-rectifier MOSFETs.
The controller senses the current across the sense resis-
tor series with the synchronous rectifier to achieve highly
accurate valley current-limit protection.
The MAX17024 includes a voltage-controlled soft-start
and soft-shutdown to limit the input surge current, provide
a monotonic power-up (even into a precharged output),
and provide a predictable power-up time. The control-
ler also includes output undervoltage and thermal-fault
protection.
The MAX17024 is available in a tiny 14-pin, 3mm x 3mm
TDFN package. For space-constrained applications, refer
to the MAX17016 single step-down with 26V internal
MOSFETs capable of supporting 10A continuous load.
The MAX17016 is available in a small 40-pin, 6mm x 6mm
TQFN package.
Applications
● Notebook Computers
● I/O and Chipset Supplies
● GPU Core Supply
● DDR Memory—VDDQ or VTT
● Point-of-Load Applications
● Step-Down Power Supply
Features
● Quick-PWM with Fast Transient Response
● Supports Any Output Capacitor
• No Compensation Required with Polymers/
Tantalum
• Stable with Ceramic Output Capacitors Using
External Compensation
● Precision 2V ±10mV Reference
● Dynamically Adjustable Output Voltage
(0 to 0.9 x VIN Range)
• Feedback Input Regulates to 0 to 2V REFIN Voltage
• 0.5% VOUT Accuracy Over Line and Load
● 26V Maximum Input Voltage Rating
● Resistively Programmable Switching Frequency
● Undervoltage/Thermal Protection
● Voltage Soft-Start and Soft-Shutdown
● Monotonic Power-Up with Precharged Output
● Power-Good Window Comparator
Ordering Information appears at end of data sheet.
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Pin Configuration
TOP VIEW
14 13 12 11 10 9 8
MAX17024
GND
1234567
TDFN
(3mm x 3mm)
19-1040; Rev 3; 3/18


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX17024 Datasheet

Single Quick-PWM Step-Down Controller

No Preview Available !

MAX17024
Single Quick-PWM Step-Down
Controller with Dynamic REFIN
Absolute Maximum Ratings
TON to GND...........................................................-0.3V to +28V
VDD to GND.............................................................-0.3V to +6V
VCC to GND.............................................. -0.3V to (VDD + 0.3V)
EN, PGOOD to GND................................................-0.3V to +6V
REF, REFIN to GND.................................. -0.3V to (VCC + 0.3V)
CS, FB to GND.......................................... -0.3V to (VCC + 0.3V)
DL to GND................................................. -0.3V to (VDD + 0.3V)
BST to GND............................................... (VDD - 0.3V) to +34V
BST to LX.................................................................-0.3V to +6V
BST to VDD............................................................-0.3V to +28V
DH to LX...................................................-0.3V to (VBST + 0.3V)
REF Short Circuit to GND..........................................Continuous
Continuous Power Dissipation (TA = +70°C)
14-Pin 3mm x 3mm TDFN
(derated 24.4mW/°C above +70°C)...........................1951mW
Operating Temperature Range (extended)......... -40°C to +85°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°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: 14-PIN TDFN
Package Code
Outline Number
Land Pattern Number
T1433+1
21-0137
90-0062
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.
Electrical Characteristics
(Circuit of Figure 1, VIN = 12V, VDD = VCC = VEN = 5V, REFIN = REF. TA = 0°C to +85°C, unless otherwise specified. Typical values
are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
PWM CONTROLLER
Input Voltage Range
VIN
2 26 V
Quiescent Supply Current (VDD) IDD + ICC FB forced above REFIN
0.7 1.2 mA
Shutdown Supply Current (VDD)
ISHDN EN = GND, TA = +25°C
0.1 2 µA
VDD-to-VCC Resistance
RCC
20
On-Time
VIN = 12V,
tON VFB = 1.0V
(Note 3)
RTON = 97.5kΩ (600kHz) 118 139 160
RTON = 200kΩ (300kHz)
250 278
306
RTON = 302.5kΩ
354 417 480
ns
Minimum Off-Time
tOFF(MIN) (Note 3)
200 300
ns
TON Shutdown Supply Current
EN = GND, VTON = 26V,
VCC = 0V or 5V, TA = +25°C
0.01
1
µA
REFIN Voltage Range
REFIN Input Current
VREFIN
IREFIN
(Note 2)
REFIN = 0.5V to 2V, TA = +25°C
0
VREF
V
-50 +50 nA
FB Voltage Range
VFB (Note 2)
0
VREF
V
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX17024
Description Single Quick-PWM Step-Down Controller
Maker Maxim Integrated
Total Page 24 Pages
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