MAX16922ATPB/V Просмотр технического описания (PDF) - Maxim Integrated
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MAX16922ATPB/V Datasheet PDF : 18 Pages
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MAX16922
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and RESET
Electrical Characteristics (continued)
(VPV1 = 13.5V, VPV2 = VPV3 = VOUT1, VPV4 = VOUT2; TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA
= +25°C under normal conditions, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
Maximum Output Current
IOUT1 (VOUT1 + 1.0V) ≤ VPV1 ≤ 28V
1.2
LX1 Leakage Current
VPV1 = 12V, LX1 = GND or VPV1;
TA = -40°C to +85°C
Maximum Duty Cycle
DCMAX
Minimum Duty Cycle
DCMIN fSW = 2.2MHz
OUTS1 Discharge Resistance
EN = low (or optionally EN = high and
VPV1 < 5.7V)
OUT2—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Supply-Voltage Range
VPV2 Fully operational
2.7
PWM Switching Frequency
fSW Internally generated
2.0
Voltage Accuracy
VOUT2
Duty cycle = 20% to 90%;
ILOAD = 1mA to 600mA, PWM = high
-3
SKIP mode (Note 4)
-2
pMOS On-Resistance
nMOS On-Resistance
pMOS Current-Limit Threshold
VPV2 = 5.0V, ILX2 = 0.2A
VPV2 = 5.0V, ILX2 = 0.2A
0.75
nMOS Zero-Crossing Threshold
Soft-Start Ramp Time
Maximum Output Current
IOUT2 VOUT2 + 0.5V ≤ VPV2 ≤ 5.5V
600
LX2 Leakage Current
VPV2 = 6V, LX2 = PGND2 or VPV2;
TA = -40°C to +85°C
Duty-Cycle Range
Forced-PWM mode only, minimum duty
cycle in skip mode is 0% (Note 4)
15
OUTS2 Discharge Resistance
OUT3—LDO REGULATOR
VEN = 0V
Input Voltage
Voltage Accuracy
Load Regulation
Dropout Voltage
Current Limit
VPV3
1.7
VOUT3 VOUT3 + 0.4V ≤ VPV3 ≤ 5.5V, ILOAD = 1mA
-2
ILOAD = 0 to 300mA
VPV3 = 1.8V, ILOAD = 250mA (Note 4)
Power-Supply Rejection Ratio
Shutdown Output Resistance
IOUT3 = 30mA, f = 1kHz
EN = low
OUT4—LDO REGULATOR
Input Voltage
Voltage Accuracy
Load Regulation
Dropout Voltage
Current Limit
VPV4
1.7
VOUT4 (VOUT4 + 0.4V) ≤ VPV4 ≤ 5.5V, ILOAD = 1mA
-2
ILOAD = 0 to 300mA
VPV4 = 1.8V, ILOAD = 250mA (Note 4)
TYP
±1
94
20
70
2.2
150
200
0.9
50
1.5
±1
70
-0.2
130
450
57
1
-0.2
130
450
MAX UNITS
A
µA
%
%
Ω
5.5
V
2.4 MHz
+3
%
+4
%
250
mΩ
350
mΩ
1.05
A
mA
ms
mA
µA
100
%
Ω
5.5
V
+2
%
%
320
mV
mA
dB
kΩ
5.5
V
+2
%
%
320
mV
mA
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