MAX16909 Datasheet, PDF (10/18 Pages) Maxim Integrated Products – 36V, 220kHz to 1MHz Step-Down Converter with Low Operating Current

MAX16909
36V, 220kHz to 1MHz Step-Down Converter
with Low Operating Current
Pin Descriptions (continued)
PIN
TSSOP TQFN
10
8
11, 12
9, 10
13, 14
11, 12
15
13
16
14
—
—
NAME
SUP
LX
SUPSW
EN
I.C.
EP
FUNCTION
Voltage Supply Input. SUP powers up the internal linear regulator. Connect a minimum
4.7FF capacitor to ground.
Inductor Switching Node. Connect a Schottky diode between LX and GND.
Internal High-Side Switch-Supply Input. SUPSW provides power to the internal switch.
Connect a 0.1FF decoupling capacitor and a 4.7FF ceramic capacitor to ground.
SUP Voltage-Compatible Enable Input. Drive EN low to disable the device. Drive EN
high to enable the device.
Internally Connected. Connect to ground for proper operation.
Exposed Pad. Connect EP to a large-area contiguous copper ground plane for effective
power dissipation. Do not use as the only IC ground connection. EP must be connected
to GND.
Internal Block Diagram
OUT
COMP
PGOOD
EN
SUP BIAS
FB
FBSW
FBOK
AON
HVLDO
EAMP
REF
SOFT-
START
SWITCH-
OVER
PWM
LOGIC
HSD
CS
SLOPE
COMP
OSC
FSYNC FOSC
MAX16909
BST
SUPSW
LX
GND
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