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MAX16956 Datasheet

Mini Buck Converter

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MAX16956
EVALUATION KIT AVAILABLE
36V, 300mA, Mini Buck Converter with
1.1µA IQ
General Description
The MAX16956 is a small, synchronous buck converter
with integrated high-side and low-side switches. The
device is designed to deliver up to 300mA with input
voltages from 3.5V to 36V, while using only 1.1µA
quiescent current at no load (fixed-output versions).
Voltage quality can be monitored by observing the
RESET signal. The device can operate near dropout by
running at 97% duty cycle, making it ideal for automotive
applications under cold-crank.
The device offers fixed-output voltages of 5V and 3.3V,
as well as an adjustable version. The adjustable version
allows the user to program the output voltage between
1V and 10V by using a resistor-divider. Frequency is fixed
at 2.1MHz, which allows for small external components,
reduced output ripple, and minimized AM radio interfer-
ence. The device offers both forced-PWM and skip modes
of operation, with ultra-low quiescent current of 1.1µA
in skip mode. The device can be ordered with spread-
spectrum frequency modulation designed to minimize
EMI-radiated emissions due to the switching frequency.
The MAX16956 is available in a small (3mm x 3mm)
10-pin µMAX® package and operates across the full auto-
motive temperature range of -40°C to +125°C. The device
is AEC-Q100 qualified.
Applications
Automotive Body ECUs
Point-of-Load Applications
Distributed DC Power Systems
Benefits and Features
Integration and High-Switching Frequency Saves
Space
• DC-DC Converter Up to 300mA Capability
• Fixed 5V/3.3V or Programmable Output-Voltage
Options (1V to 10V)
• Current-Mode-Control Architecture
• 2.1MHz Operating Frequency
• Fixed 5.4ms Internal Soft-Start
Spread-Spectrum Frequency Modulation Reduces
EMI Emissions
Low IQ Enables Designers to Meet Stringent OEM
Module Power-Consumption Requirements
• 1.1µA Quiescent Current in Standby Mode
(Fixed-Output-Voltage Versions Only)
Wide Input Voltage Range Supports Automotive
Applications
• Operating VIN Range: 3.5V to 36V (42V Tolerant)
• 97% (Max) Duty-Cycle Operation with Low
Dropout
Robust Performance Supports Wide Range of
Automotive Applications
• Short-Circuit, Thermal Protections
• -40°C to +125°C Automotive Temperature Range
• AEC-Q100 Qualified
Typical Application Circuits, Ordering Information, and
Selector Guide appear at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products,
Inc.
19-6737; Rev 5; 10/15


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16956 Datasheet

Mini Buck Converter

No Preview Available !

MAX16956
36V, 300mA, Mini Buck Converter with
1.1µA IQ
Absolute Maximum Ratings
(Voltages Referenced to PGND)
SUP........................................................................-0.3V to +42V
EN...............................................................-0.3V to VSUP + 0.3V
BST to LX...............................................................................+6V
BST.........................................................................-0.3V to +47V
MODE, OUT/FB, RESET.......................... -0.3V to VBIAS + 0.3V
AGND....................................................................-0.3V to +0.3V
BIAS......................................................................-0.3V to +6.0V
OUT/FB Short-Circuit Duration..................................Continuous
Continuous Power Dissipation (TA = +70°C)
(derate 12.9mW/ºC above +70°C).............................1031mW
Operating Temperature Range.......................... -40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s)....................................300°C
Soldering Temperature (reflow)........................................ +260ºC
Package Thermal Characteristics(Note 1)
µMAX
Junction-to-Ambient Thermal Resistance (BJA)....... 77.6°C/W
Junction-to-Case Thermal Resistance (BJC)..................... 5°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.
Electrical Characteristics
(VSUP = VEN = 14V, VMODE = 0V, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C, unless
otherwise noted.) (Note 2)
PARAMETER
Supply Voltage
Supply Voltage
Supply Current
UV Lockout
BIAS Regulator Voltage
BIAS Current Limit
BUCK CONVERTER
Voltage Accuracy
Output Voltage Range
FB Voltage Accuracy
FB Input Current
FB Load Regulation
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VSUP
VSUP
ISUP
T < 500ms (Note 3)
VEN = 0V
No load, fixed 3.3V VOUT
No load, fixed 5V VOUT
No load, adjustable VOUT
VMODE = VBIAS , no load, FPWM, no
switching
3.5 36
42
0.75
3.0
1.1 3.0
1.8 5.0
32 70
0.5 1 1.5
V
V
µA
mA
VBIAS rising
Hysteresis
3.0 3.2 3.4
0.4
V
VBIAS VSUP = 5.5V to 36V (MAX16956C/F only)
10
5
V
mA
VOUT,5V
VOUT,3.3V
VOUT
VFB
IFB
ΔVLOAD
VOUT = 5V
VOUT = 3.3V
6V ≤ VSUP
36V, ILOAD = 0 to
300mA
Adjustable output versions
Adjustable output versions, 6V ≤ VSUP ≤ 36V
VFB = 1V
ILOAD = 0.3mA to 300mA
4.9
3.2
1
0.98
5.0
3.3
1.0
0.02
1
5.2
3.4
10
1.03
V
V
V
µA
%
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX16956
Description Mini Buck Converter
Maker Maxim Integrated
PDF Download

MAX16956 Datasheet PDF






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