MAX16922(2009) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX16922 Datasheet PDF : 16 Pages
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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)
20-Pin TQFN-EP (derate 31.3 mW/°C above +70°C)....... 2500mW
20-Pin TSSOP-EP (derate 26.5 mW/°C above +70°C)..... 2122mW
Junction-to-Case Thermal Resistance (θJC) (Note 1)
20-Pin TQFN-EP .......................................................... 2.7°C/W
20-Pin TSSOP-EP ........................................................... 2°C/W
Junction-to-Ambient Thermal Resistance (θJA) (Note 1)
20-Pin TQFN-EP ........................................................... 32°C/W
20-Pin TSSOP-EP ..................................................... 37.7°C/W
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
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 http://www.maxim-ic.com/thermal-tutorial.
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.
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
VUVLO,R
VUVLO,F
VBRLE
PV1 rising
PV1 falling
PV1 falling (option enabled)
BST Refresh Load Hysteresis
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
Maximum Output Current
IOUT1 (VOUT1 + 1.0V) ≤ VPV1 ≤ 28V
LX1 Leakage Current
VPV1 = 12V, LX1 = GND or VPV1;
TA = -40°C to +85°C
Maximum Duty Cycle
Minimum Duty Cycle
DCMAX
DCMIN
fSW = 2.2MHz
OUTS1 Discharge Resistance
EN = low (or optionally EN = high and
VPV1 < 5.7V)
MIN TYP MAX UNITS
3.7
28
45
3.7
4.0
2.9
3.3
5.7
0.25
4.75
5.0
5.25
5
2.0
2.2
2.4
-3
+3
-2
+4
300 700
1.4
1.75
2.1
2.2
1.2
±1
97
20
70
V
V
V
V
V
µA
MHz
%
mΩ
A
ms
A
µA
%
%
Ω
2 _______________________________________________________________________________________
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