MAX16922 Datasheet, PDF (3/16 Pages) Maxim Integrated Products – 2.2MHz, Dual, Step-Down DC-DC Converters, Dual LDOs, and RESET

2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and RESET
ELECTRICAL CHARACTERISTICS (continued)
(V_PV1 = 13.5V, V_PV2 = V_PV3 = V_OUT1, V_PV4 = V_OUT2; T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at
T_A = +25°C under normal conditions, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
OUT2—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Supply-Voltage Range
PWM Switching Frequency
Voltage Accuracy
pMOS On-Resistance
nMOS On-Resistance
pMOS Current-Limit Threshold
V_PV2
f_SW
V_OUT2
Fully operational
Internally generated
Duty cycle = 20% to 90%;
I_LOAD = 1mA to 600mA, PWM = high
SKIP mode (Note 4)
V_PV2 = 5.0V, I_LX2 = 0.2A
V_PV2 = 5.0V, I_LX2 = 0.2A
2.7
5.5
V
2.0
2.2
2.4
MHz
-3
+3
%
-2
+4
%
150 250
mΩ
200 350
mΩ
0.75 0.9 1.05
A
nMOS Zero-Crossing Threshold
50
mA
Soft-Start Ramp Time
1.5
ms
Maximum Output Current
I_OUT2 V_OUT2 + 0.5V ≤ V_PV2 ≤ 5.5V
600
mA
LX2 Leakage Current
V_PV2 = 6V, LX2 = PGND2 or V_PV2;
T_A = -40°C to +85°C
±1
µA
Duty-Cycle Range
Forced-PWM mode only, minimum duty
cycle in skip mode is 0% (Note 4)
15
100
%
OUTS2 Discharge Resistance
EN = 0V
70
Ω
OUT3—LDO REGULATOR
Input Voltage
V_PV3
1.7
5.5
V
Voltage Accuracy
V_OUT3 V_OUT3 + 0.4V ≤ V_PV3 ≤ 5.5V, I_LOAD = 1mA
-2
+2
%
Load Regulation
I_LOAD = 0 to 300mA
-0.2
%
Dropout Voltage
V_PV3 = 1.8V, I_LOAD = 250mA (Note 4)
130 320
mV
Current Limit
450
mA
Power-Supply Rejection Ratio
Shutdown Output Resistance
I_OUT3 = 30mA, f = 1kHz
EN = low
57
dB
1
kΩ
OUT4—LDO REGULATOR
Input Voltage
Voltage Accuracy
Load Regulation
V_PV4
1.7
5.5
V
V_OUT4 (V_OUT4 + 0.4V) ≤ V_PV4 ≤ 5.5V, I_LOAD = 1mA
-2
+2
%
I_LOAD = 0 to 300mA
-0.2
%
Dropout Voltage
V_PV4 = 1.8V, I_LOAD = 250mA (Note 4)
130 320
mV
Current Limit
450
mA
Power-Supply Rejection Ratio
Shutdown Output Resistance
THERMAL OVERLOAD
I_OUT4 = 30mA, f = 1kHz
EN = low
57
dB
1
kΩ
Thermal-Shutdown Temperature
(Note 4)
150
175
°C
Thermal-Shutdown Hysteresis
15
°C
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