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
Absolute Maximum Ratings
PV1, EN to GND .....................................................-0.3V to +45V
LX1 to GND.................................................-0.5V to (PV1 + 0.3V)
LX2 to GND.................................................-0.5V to (PV2 + 0.3V)
BST to LX1.............................................................-0.3V to +6.0V
PV2, PV3, PV4, OUTS1, PWM, RESET to GND_....-0.3V to +6.0V
OUTS2 .......................................................-0.3V to (PV2 + 0.3V)
OUT3 .........................................................-0.3V to (PV3 + 0.3V)
OUT4 .........................................................-0.3V to (PV4 + 0.3V)
LX1 RMS Current .................................................................2.0A
LX2 RMS Current .................................................................1.2A
PGND2 to GND_....................................................-0.3V to +0.3V
LSUP to GND............................................................-0.3V to +6V
OUTS_, OUT_ Output Short-Circuit Duration .............Continuous
Continuous Power Dissipation (TA = +70°C)
TQFN (derate 31.3 mW/°C above +70°C)..................2500mW
TSSOP (derate 26.5 mW/°C above +70°C).................... 2122mW
ESDHB (all pins)...................................................................±2kV
ESDMM (all pins)................................................................±200V
ESDCDM (corner pins).......................................................±750V
ESDCDM (other pins).........................................................±500V
Operating Temperature Range ..........................-40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ..................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Thermal Characteristics (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θJA)...........30°C/W
Junction-to-Case Thermal Resistance (θJC)..................2°C/W
TSSOP
Junction-to-Ambient Thermal Resistance (θJA)........37.7°C/W
Junction-to-Case Thermal Resistance (θJC)..................2°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(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
OUT1—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Supply-Voltage Range
VPV1
(Note 3)
Operation < 500ms
PV1 Undervoltage Lockout
BST Refresh Load Enable
BST Refresh Load Hysteresis
VUVLO,R
VUVLO,F
VBRLE
PV1 rising
PV1 falling
PV1 falling (option enabled)
LSUP Regulator Voltage
Supply Current
PWM Switching Frequency
VLSUP
IPV1
fSW
6V ≤ VPV1 ≤ 28V
EN = low
Internally generated
Voltage Accuracy
VOUT1
Duty cycle = 20% to 90%;
ILOAD = 300mA to 1.2A
SKIP mode (Note 4)
DMOS On-Resistance
Current-Limit Threshold
VPV1 = 4V, VBST = 9V, ILX1 = 0.2A
Soft-Start Ramp Time
MIN TYP MAX UNITS
3.7
28
V
45
3.7
4.0
V
2.85 3.3
6.45
V
0.65
V
4.75 5.0 5.45
V
14
µA
2.0
2.2
2.4 MHz
-3
+3
%
-2
+4
300
700
mΩ
1.4 1.75 2.1
A
2.2
ms
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