MAX16903 Maxim Integrated Products, MAX16903 Datasheet - Page 7

• Manufacturer Part Number: MAX16903
• Description: 1A Mini-Buck Converter
• Manufacturer: Maxim Integrated Products

DataSheet.in
The MAX16903 is a small, current-mode buck converter
that features synchronous rectification and requires no
external compensation network. The MAX16903 is
designed for 1A output current. The MAX16903 can stay
in dropout by running at 97% duty cycle. It provides an
TDFN-EP
2.1MHz, High-Voltage, 1A Mini-Buck Converter
10
⎯
5
6
7
8
9
PIN
OUTS
TSSOP-EP
BIAS
9, 10, 16
EN
11
12
13
14
15
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Detailed Description
SOFT-START
V
GOOD
PGOOD
NAME
OUTS
SYNC
BIAS
GND
N.C.
EN
HVLDO
COMP
EAMP
Buck Regulator Voltage-Sense Input. Bypass OUTS to PGND with a 10µF or larger X7R
ceramic capacitor.
Open-Drain Power-Good Output. External pullup resistor required for automatic SKIP
mode operation.
Sync Input. SYNC allows the device to synchronize to other supplies. When connected
to GND or unconnected, skip mode is enabled under light loads. When connected to a
clock source or BIAS, forced PWM mode is enabled.
+5V Internal Logic Supply. Connect a 2.2µF ceramic capacitor from BIAS to GND.
Analog Ground
Enable Input. EN is high-voltage compatible. Drive EN HIGH for normal operation.
No Connection. Not internally connected.
PGOOD
SLOPE COMPENSATION
CURRENT-SENSE
BANDGAP
AND
PWM
REF
MAX16903
accurate output voltage within the input range of +6.5V
to +18V. Voltage quality can be monitored by observing
the PGOOD signal. The MAX16903 operates at 2.1MHz
(typ) frequency, which allows for small external compo-
nents, reduced output ripple, and guarantees no AM
band interference.
SYNC
OSC
CONTROL
LOGIC
GND
Pin Description (continued)
FUNCTION
CLK
HSD
LSD
BIAS
Functional Diagram
BST
SUP
LX
PGND
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