MAX16930 Datasheet, PDF (3/29 Pages) Maxim Integrated Products – 2MHz, 36V, Dual Buck with Preboost and 20μA Quiescent Current

MAX16930/MAX16931
2MHz, 36V, Dual Buck with Preboost and
20µA Quiescent Current
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = 14V, V_BIAS = 5V, C_BIAS = 6.8μF, T_A = T_J = -40NC to +125NC, unless otherwise noted.) (Note 2)
PARAMETER
Regulated Feedback Voltage
Output Overvoltage Threshold
Feedback Leakage Current
Feedback Line Regulation Error
Transconductance
(from FB_ to COMP_)
Dead Time
Maximum Duty-Cycle
Minimum On-Time
PWM Switching Frequency
Range
Buck 2 Switching Frequency
Switching Frequency Accuracy
Spread-Spectrum Range
FSYNC INPUT
FSYNC Frequency Range
FSYNC Switching Thresholds
CS Current-Limit Voltage
Threshold
Skip Mode Threshold
Soft-Start Ramp Time
Phase Shift Between Buck1 and
Buck 2
LX1, LX2 Leakage Current
DH1, DH2 Pullup Resistance
DH1, DH2 Pulldown Resistance
SYMBOL
V_FB1,2
I_FB1,2
CONDITIONS
FB rising
FB falling (Note 3)
T_A = +25NC
V_IN = 3.5V to 36V, V_FB = 1V
g_m
V_FB = 1V, V_BIAS = 5V (Note 4)
t_ON(MIN)
f_SW
MAX16930, DL_ low to DH_ high
MAX16930, DH_ low to DL_ high
MAX16931, DL_ low to DH_ high
MAX16931, DH_ low to DL_ high
Buck 1, buck 2
Buck 1, buck 2
Programmable, high frequency,
MAX16930
Programmable, low frequency,
MAX16931
MAX16930ATLT/V+,
MAX16930ATLU/V+ only
MAX16930, R_FOSC = 13.7kI,
V_BIAS = 5V
MAX16931, R_FOSC = 80.6kI,
V_BIAS = 5V
Spread spectrum enabled
MIN TYP MAX
0.99 1.0 1.01
+10 +15 +20
+5
+10 +15
0.01
1
0.00
1200 2400
35
60
60
100
95
50
1
2.2
0.2
1
1/2f_SW
1.98 2.2 2.42
360 400 440
±6
Minimum sync pulse of 100ns, MAX16930 1.2
Minimum sync pulse of 100ns, MAX16931 240
High threshold
1.5
Low threshold
V_LIMIT1,2 V_CS - V_OUT, V_BIAS = 5V, V_OUT R 2.5V
64
Current sense = 80mV
Buck 1 and buck 2, fixed soft-start time
regardless of frequency
2
V_IN = 6V, V_{LX_} = V_IN, T_A = +25NC
V_BIAS = 5V, I_{DH_} = -100mA
V_BIAS = 5V, I_{DH_} = +100mA
2.4
1200
0.6
80
96
15
6
10
180
0.01
1
10
20
2
4
UNIT
V
%
FA
%/V
FS
ns
%
ns
MHz
MHz
MHz
kHz
%
MHz
kHz
V
mV
mV
ms
°
FA
I
I
Maxim Integrated
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