Datasheet

MAX16962
4A, 2.2MHz, Synchronous Step-Down
DC-DC Converter
3Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
PV
= V
PV1
= V
PV2
= 5V, V
EN
= 5V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
Maximum pMOS Current-Limit
Threshold
ILIMP1 LX1 and LX2 shorted together 5.2 6.8 8.5 A
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Maximum Output Current IOUT (VOUT + 0.5V P VPV1 P 5.5V) (Note 3) 4.4 A
OUTS Bias Current IB_OUTS
Fixed output voltage variants 1 2 5
FA
Adjustable output version -1 +1
LX_ Leakage Current ILX_LEAK
VPV_ = 5V, LX_ = PGND_ or PV_,
TA = +25°C
-1 +1 FA
Minimum On-Time tON_MIN 60 ns
LX Discharge Resistance RLX VEN = 0V, through the OUTS pin 15 24 55
I
Maximum Short-Circuit Current 10.4 A
OSCILLATOR
Oscillator Frequency fSW Internally generated 2.0 2.2 2.4 MHz
Spread Spectrum Df/f Spread-spectrum enabled +6 %
SYNC Input Frequency Range fSYNC 50% duty cycle (Note 4) 1.7 2.4 MHz
THERMAL OVERLOAD
Thermal Shutdown Threshold +165 °C
Thermal Shutdown Hysteresis 15 °C
POWER-GOOD OUTPUT (PG)
PG Overvoltage Threshold PGOVTH Percentage of nominal output 106 110 114 %
PG Undervoltage Threshold PGUVTH Percentage of nominal output 90 92 94 %
PG Timeout Period 16 ms
Undervoltage/Overvoltage
Propagation Delay
28 Fs
Output High Leakage Current TA = +25
°
C 0.2 FA
PG Output Low Voltage
ISINK = 3mA 0.4
V
VPV = 1.2V, ISINK = 100FA 0.4
ENABLE INPUTS (EN)
Input Voltage High VINH Input rising 2.4 V
Input Voltage Low VINL Input falling 0.5 V
Input Hysteresis 0.85 V
Input Current VEN = high 0.1 1.0 2 FA
Pulldown Resistor VEN = low 50 100 200 kI
DIGITAL INPUTS (PWM, SYNC AS INPUT)
Input Voltage High VINH 1.8 V
Input Voltage Low VINL 0.4 V