Datasheet

MAX16903
2.1MHz, High-Voltage, 1A Mini-Buck Converter
4
Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
SUP
= +14V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Skip-Mode Peak Current I
SKIP
350 mA
High-Side DMOS RDS
ON
R
ON,HS
V
BIAS
= 5V 400 800 m
Low-Side DMOS RDS
ON
R
ON,LS
250 450 m
DMOS Peak Current-Limit
Threshold
I
MAX
1.275 1.5 1.75 A
Soft-Start Ramp Time t
SS
7 8 9 ms
LX Rise Time t
RISE,LX
5 ns
Minimum On-Time t
ON
80 ns
PWM Switching Frequency f
SW
Internally generated 1.925 2.1 2.275 MHz
SYNC Input Frequency Range f
SYNC
1.8 2.6 MHz
Spread-Spectrum Range SS Spread-spectrum option only +6 %
PGOOD
V
THR,PGD
V
OUT
rising 93
PGOOD Threshold
V
THF,PGD
V
OUT
falling 88 91 94
%
PGOOD Debounce t
DEB
10 µs
PGOOD HIGH Leakage Current I
LEAK,PGD
T
A
= +25°C, V
PGD
 V
OUT
1 µA
PGOOD Output Low Level V
OUT,PGD
Sinking 1mA 0.4 V
LOGIC LEV EL S
V
IH,EN
2.4
EN Level
V
IL,EN
0.6
V
EN Input Current I
IN,EN
V
EN
= V
SUP
= +42V, T
A
= +25°C 1 µA
V
IH,SYNC
1.4
SYNC Switching Threshold
V
IL,SYNC
0.4
V
SYNC Internal Pulldown R
PD,SYNC
200 k
THERMAL PROTECTION
Thermal Shutdown T
SHDN
175 °C
Thermal Shutdown Hysteresis T
SHDN,HYS
15 °C
Note 2: When the typical minimum on-time of 80ns is violated, the device skips pulses.
Note 3: Guaranteed by design; not production tested.