MAX16974EVKIT+ Maxim Integrated Products, MAX16974EVKIT+ Datasheet - Page 10

• Manufacturer Part Number: MAX16974EVKIT+
• Description: Power Management Modules & Development Tools MAX16974 EVAL KIT MAX16974 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX16974EVKIT+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High-Voltage, 2.2MHz, 2A Automotive Step-
Down Converter with Low Operating Current
Figure 2. Internal Block Diagram
The MAX16974 is a constant-frequency, current-mode,
automotive buck converter with an integrated high-side
switch. The device operates with 3.5V to 28V input volt-
ages and tolerates input transients up to 42V. During
undervoltage events, such as cold-crank conditions, the
internal pass device maintains up to 92% duty cycle.
An open-drain, active-low reset output helps monitor the
output voltage. The device offers an adjustable reset
threshold that helps keep microcontrollers alive down
to their lowest specified input voltage. A capacitor pro-
grammable reset timeout ensures proper startup.
10
FSYNC
RESETI
CRES
EN
_____________________________________________________________________________________
STANDBY
SUPPLY
SUP
Detailed Description
LDO
START
SOFT-
UVLO
BIAS
B.G.
REF
FOSC
OSC
REF
I
SENSE
SUM
The switching frequency is resistor programmable from
220kHz to 2.2MHz to allow optimization for efficiency,
noise, and board space. A clock input, FSYNC, allows
the device to synchronize to an external clock.
During light-load conditions, the device enters skip
mode that reduces the quiescent current down to 35FA.
The 5V fixed output voltage option eliminates the need
for external resistors and reduces the supply current by
up to 50FA. See Figure 2 for the internal block diagram.
The device’s supply voltage range (V
with the typical 3.5V to 28V automotive battery voltage
range and can tolerate transients up to 42V.
GND
EA
COMP
V
BIAS
COMP
PWM
I
LIM
10µA
LOGIC FOR
DROPOUT
Supply Voltage Range (SUP)
COMP
LOGIC
LEVEL
SHIFT
DRV
BST
MUX
MAX16974
SUP
) is compatible
SUPSW
LX
OUT
FB
COMP
RES