MAX16922_10 Datasheet, PDF (2/17 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
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 (T_A = +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 (θ_JC) (Note 1)
20-Pin TQFN-EP .......................................................... 2.7°C/W
20-Pin TSSOP-EP ........................................................... 2°C/W
Junction-to-Ambient Thermal Resistance (θ_JA) (Note 1)
20-Pin TQFN-EP ........................................................... 32°C/W
20-Pin TSSOP-EP ..................................................... 37.7°C/W
ESD_HB (all pins) ...................................................................±2kV
ESD_MM (all pins) ................................................................±200V
ESD_CDM (corner pins) .......................................................±750V
ESD_CDM (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)
TSSOP...........................................................................+240°C
TQFN.............................................................................+260°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 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
(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
OUT1—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Supply-Voltage Range
V_PV1
(Note 3)
Operation < 500ms
PV1 Undervoltage Lockout
BST Refresh Load Enable
V_UVLO,R
V_UVLO,F
V_BRLE
PV1 rising
PV1 falling
PV1 falling (option enabled)
BST Refresh Load Hysteresis
LSUP Regulator Voltage
Supply Current
PWM Switching Frequency
V_LSUP
I_PV1
f_SW
6V ≤ V_PV1 ≤ 28V
EN = low
Internally generated
Voltage Accuracy
V_OUT1
Duty cycle = 20% to 90%;
I_LOAD = 300mA to 1.2A
SKIP mode (Note 4)
DMOS On-Resistance
Current-Limit Threshold
V_PV1 = 4V, V_BST = 9V, I_LX1 = 0.2A
Soft-Start Ramp Time
Maximum Output Current
I_OUT1 (V_OUT1 + 1.0V) ≤ V_PV1 ≤ 28V
LX1 Leakage Current
V_PV1 = 12V, LX1 = GND or V_PV1;
T_A = -40°C to +85°C
Maximum Duty Cycle
Minimum Duty Cycle
DC_MAX
DC_MIN
f_SW = 2.2MHz
MIN TYP MAX UNITS
3.7
28
45
3.7
4.0
2.85 3.3
6.45
0.65
4.75
5.0
5.45
14
2.0
2.2
2.4
-3
+3
-2
+4
300 700
1.4
1.75
2.1
2.2
1.2
±1
94
20
V
V
V
V
V
µA
MHz
%
mΩ
A
ms
A
µA
%
%
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