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MAX16974 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX16974
Description  High-Voltage, 2.2MHz, 2A Automotive Step- Down Converter with Low Operating Current
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX16974 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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________________________________________________________________ _Maxim Integrated Products_ _ 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
High-Voltage, 2.2MHz, 2A Automotive Step-
Down Converter with Low Operating Current
General Description
The MAX16974 is a 2A, current-mode, step-down con-
verter with an integrated high-side switch. It is designed
to operate with 3.5V to 28V input voltages, while using
only 35FA quiescent current at no load. The switching
frequency is adjustable from 220kHz to 2.2MHz by an
external resistor and can be synchronized to an external
clock. The output voltage is pin selectable to be 5V fixed
or 1V to 10V adjustable. The wide input voltage range
makes the device ideal for automotive and industrial
applications.
The device operates in skip mode for reduced current
consumption in light-load applications. An adjustable
reset threshold helps keep microcontrollers alive down to
their lowest specified input voltage. Protection features
include cycle-by-cycle current limit, overvoltage, and
thermal shutdown with automatic recovery. The device
also features a power-good monitor to ease power-
supply sequencing.
The device operates over the -40°C to +125°C auto-
motive temperature range and is available in a 16-pin
TSSOP-EP package.
Applications
Automotive
Industrial
Features
S
Wide_3.5V_to_28V_Input_Voltage_Range
S
42V_Input_Transient_Tolerance
S
5V_Fixed_or_1V_to_10V_Adjustable_Output_Voltage
S
Integrated_2A_Internal_High-Side_Switch
S
Adjustable_Switching_Frequency_(220kHz_to_
2.2MHz)
S
Operates_Through_Cold_Crank_with_High_Duty_
Cycle
S
Frequency_Synchronization_Input
S
Internal_Boost_Diode
S
35µA_Skip-Mode_Operating_Current
S
5µA_Typical_Shutdown_Current
S
Adjustable_Power-Good_Output_Level_and_Timing
S
3.3V_Logic_Level_to_42V_Compatible_Enable_Input
S
Current-Limit,_Thermal-Shutdown,_and_
Overvoltage_Protections
S
Automotive_Temperature_Range:_-40°C_to_+125°C
S
AEC-Q100_Qualified
19-5630; Rev 1; 7/11
Typical Application Circuit
Ordering Information
/V Denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
EVALUATION
_KIT
AVAILABLE
PART
TEMP_RANGE
PIN-PACKAGE
MAX16974AUE/V+
-40NC to +125NC
16 TSSOP-EP*
MAX16974
D1
COUT
22µF
CIN2
4.7µF
CIN1
47µF
CCRES
100pF
RCOMP
20kI
RRES
10kI
RFOSC
12.1kI
L1
4.7µH
VOUT =
5V AT 2A
CBST
0.1µF
LX
BST
VOUT
PLACE CIN2 (4.7µF) AND CIN3 (0.1µF) NEXT TO SUP.
PLACE CIN4 (0.1µF) AND CIN5 (4.7µF) NEXT TO SUPSW.
OUT
VBIAS
VBAT
FB
RESETI
VBIAS
RES
FOSC
CRES
CBIAS
1µF
CCOMP2
OPEN
BIAS
CCOMP1
5600pF
COMP
FSYNC
EN
SUPSW
SUP
CIN3
0.1µF
CIN4
0.1µF
CIN5
4.7µF
GND


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