Datasheet

MAX16936
36V, 220kHz to 2.2MHz Step-Down Converter
with 28µA Quiescent Current
4Maxim Integrated
Note 2: Device not in dropout condition.
Note 3: Guaranteed by design; not production tested.
Note 4: FB regulation voltage is 1%, 1.01V (max), for -40°C < T
A
< +105°C.
Note 5: Contact the factory for SYNC frequency outside the specified range.
ELECTRICAL CHARACTERISTICS (continued)
(V
SUP
= V
SUPSW
= 14V, V
EN
= 14V, L1 = 2.2FH, C
IN
= 4.7FF, C
OUT
= 22FF, C
BIAS
= 1FF, C
BST
= 0.1FF, R
FOSC
= 12kI,
T
A
= T
J
= -40NC to +125NC, unless otherwise noted. Typical values are at T
A
= +25NC.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OSCILLATOR FREQUENCY
Oscillator Frequency
R
FOSC
= 73.2kI 340 400 460 kHz
R
FOSC
= 12kI 2.0 2.2 2.4 MHz
EXTERNAL CLOCK INPUT (FSYNC)
External Input Clock
Acquisition time
t
FSYNC
1 Cycles
External Input Clock
Frequency
R
FOSC
= 12kI (Note 5) 1.8 2.6 MHz
External Input Clock High
Threshold
V
FSYNC_HI
VFSYNC rising
1.4 V
External Input Clock Low
Threshold
V
FSYNC_LO
VFSYNC falling 0.4 V
Soft-Start Time t
SS
5.6 8 12 ms
ENABLE INPUT (EN)
Enable Input High Threshold V
EN_HI
2.4 V
Enable Input Low Threshold V
EN_LO
0.6
Enable Threshold Voltage
Hysteresis
V
EN_HYS
0.2 V
Enable Input Current I
EN
T
A
= +25NC 0.1 1 FA
POWER GOOD (PGOOD)
PGOOD Switching Level
V
TH_RISING
V
FB
rising, V
PGOOD
= high 93 95 97
%V
FB
V
TH_FALLING
V
FB
falling, V
PGOOD
=low 90 92 94
PGOOD Debounce Time 10 25 50 Fs
PGOOD Output Low Voltage I
SINK
= 5mA 0.4 V
PGOOD Leakage Current V
OUT
in regulation, T
A
= +25NC 1 FA
SYNCOUT Low Voltage I
SINK
= 5mA 0.4 V
SYNCOUT Leakage Current T
A
= +25NC 1 FA
FSYNC Leakage Current T
A
= +25NC 1 FA
OVERVOLTAGE PROTECTION
Overvoltage Protection
Threshold
V
OUT
rising (monitored at FB pin) 107
%
V
OUT
falling (monitored at FB pin) 105