Datasheet

MAX16932/MAX16933
2.2MHz, 36V, Dual Buck
with 20µA Quiescent Current
4Maxim Integrated
Note 2: Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range and relevant supply volt-
age range are guaranteed by design and characterization. Typical values are at T
A
= +25°C.
Note 3: Overvoltage protection is detected at the FB1/FB2 pins. If the feedback voltage reaches overvoltage threshold of FB1/FB2
+ 15% (typ), the corresponding controller stops switching. The controllers resume switching once the output drops below
FB1/FB2 + 10% (typ).
Note 4: Guaranteed by design; not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 14V, V
BIAS
= 5V, C
BIAS
= 6.8µF, T
A
= T
J
= -40NC to +125NC, unless otherwise noted. Typical values are at T
A
= +25NC
under normal conditions, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT
PGOOD1, PGOOD2 Threshold
P
GOOD_H
% of V
OUT_
, rising 85 90 95
%
P
GOOD_F
% of V
OUT_
, falling 80 85 90
PGOOD1, PGOOD2 Leakage
Current
V
PGOOD1,2
= 5V, T
A
= +25NC 0.01 1 FA
PGOOD1, PGOOD2 Startup
Delay Time
Buck 1 and buck 2 after soft-start
is complete
64 Cycles
PGOOD1, PGOOD2 Debounce
Time
Fault detection 8 20 50 Fs
INTERNAL LDO: BIAS
Internal BIAS Voltage V
IN
> 6V 4.75 5 5.25 V
BIAS UVLO Threshold
V
BIAS
rising 3.1 3.4
V
V
BIAS
falling 2.7 2.9
Hysteresis 0.2 V
External V
CC
V
TH,EXTVCC
EXTVCC rising, HYST = 110mV 3.0 3.2 V
THERMAL OVERLOAD
Thermal Shutdown Temperature (Note 4) +170 NC
Thermal Shutdown Hysteresis (Note 4) 20 NC
EN LOGIC INPUT
High Threshold 1.8 V
Low Threshold 0.8 V
Input Current T
A
= +25NC 1 FA