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 (θ
JA
)...........30°C/W
Junction-to-Case Thermal Resistance (θ
JC
)..................2°C/W
TSSOP
Junction-to-Ambient Thermal Resistance (θ
JA
)........37.7°C/W
Junction-to-Case Thermal Resistance (θ
JC
)..................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
PARAMETER
(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)
SYMBOL
(Note 3)
Operation < 500ms
PV1 rising
PV1 falling
PV1 falling (option enabled)
6V ≤ V
PV1
≤ 28V
EN = low
Internally generated
Duty cycle = 20% to 90%;
I
LOAD
= 300mA to 1.2A
SKIP mode (Note 4)
V
PV1
= 4V, V
BST
= 9V, I
LX1
= 0.2A
1.4
2.0
-3
-2
300
1.75
2.2
4.75
2.85
3.7
3.3
6.45
0.65
V
LSUP
I
PV1
f
SW
V
OUT1
5.0
14
2.2
2.4
+3
+4
700
2.1
mΩ
A
ms
5.45
CONDITIONS
MIN
3.7
TYP
MAX
28
45
4.0
UNITS
OUT1—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Supply-Voltage Range
PV1 Undervoltage Lockout
BST Refresh Load Enable
BST Refresh Load Hysteresis
LSUP Regulator Voltage
Supply Current
PWM Switching Frequency
Voltage Accuracy
DMOS On-Resistance
Current-Limit Threshold
Soft-Start Ramp Time
V
PV1
V
UVLO,R
V
UVLO,F
V
BRLE
V
V
V
V
V
µA
MHz
%
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Maxim Integrated
│
2
MAX16922
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and
RESET
Electrical Characteristics (continued)
PARAMETER
Maximum Output Current
LX1 Leakage Current
Maximum Duty Cycle
Minimum Duty Cycle
OUTS1 Discharge Resistance
DC
MAX
DC
MIN
SYMBOL
I
OUT1
(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)
CONDITIONS
(V
OUT1
+ 1.0V) ≤ V
PV1
≤ 28V
V
PV1
= 12V, LX1 = GND or V
PV1
;
T
A
= -40°C to +85°C
f
SW
= 2.2MHz
EN = low (or optionally EN = high and
V
PV1
< 5.7V)
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
0.75
2.7
2.0
-3
-2
150
200
0.9
50
1.5
I
OUT2
V
OUT2
+ 0.5V ≤ V
PV2
≤ 5.5V
V
PV2
= 6V, LX2 = PGND2 or V
PV2
;
T
A
= -40°C to +85°C
Forced-PWM mode only, minimum duty
cycle in skip mode is 0% (Note 4)
V
EN
= 0V
V
PV3
V
OUT3
V
OUT3
+ 0.4V ≤ V
PV3
≤ 5.5V, I
LOAD
= 1mA
I
LOAD
= 0 to 300mA
V
PV3
= 1.8V, I
LOAD
= 250mA (Note 4)
I
OUT3
= 30mA, f = 1kHz
EN = low
V
PV4
V
OUT4
(V
OUT4
+ 0.4V) ≤ V
PV4
≤ 5.5V, I
LOAD
= 1mA
I
LOAD
= 0 to 300mA
V
PV4
= 1.8V, I
LOAD
= 250mA (Note 4)
1.7
-2
-0.2
130
450
320
1.7
-2
-0.2
130
450
57
1
5.5
+2
320
15
70
5.5
+2
600
±1
100
2.2
MIN
1.2
±1
94
20
70
TYP
MAX
UNITS
A
µA
%
%
Ω
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
nMOS Zero-Crossing Threshold
Soft-Start Ramp Time
Maximum Output Current
LX2 Leakage Current
Duty-Cycle Range
OUTS2 Discharge Resistance
OUT3—LDO REGULATOR
Input Voltage
Voltage Accuracy
Load Regulation
Dropout Voltage
Current Limit
Power-Supply Rejection Ratio
Shutdown Output Resistance
OUT4—LDO REGULATOR
Input Voltage
Voltage Accuracy
Load Regulation
Dropout Voltage
Current Limit
V
%
%
mV
mA
V
%
%
mV
mA
dB
kΩ
5.5
2.4
+3
+4
250
350
1.05
V
MHz
%
%
mΩ
mΩ
A
mA
ms
mA
µA
%
Ω
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Maxim Integrated
│
3
MAX16922
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and
RESET
Electrical Characteristics (continued)
PARAMETER
Power-Supply Rejection Ratio
Shutdown Output Resistance
THERMAL OVERLOAD
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
RESET
OUT1 OV Threshold
OUT1 Reset Threshold
OUT2 Reset Threshold
(Note 4)
SYMBOL
EN = low
(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)
CONDITIONS
I
OUT4
= 30mA, f = 1kHz
MIN
TYP
57
1
150
175
15
110
Reset option 1 (see the
Selector Guide)
Reset option 2 (see the
Selector Guide)
Percentage of nominal output
Reset timeout option 1 (see the
Selector
Guide)
Reset timeout option 2 (see the
Selector
Guide)
Sinking -3mA
28
EN rising
V
EN
= 5V
PWM rising
PWM falling
1.8
0.4
1.4
1.8
0.4
0.5
2.2
85
75
85
90
80
90
14.9
ms
1.9
1
0.4
µA
V
µs
V
V
µA
V
V
µA
95
85
95
MAX
UNITS
dB
kΩ
°C
°C
%
%
%
Reset Timeout Period
Output-High Leakage Current
Output Low Level
UV Propagation Time
EN LOGIC INPUT
EN Threshold Voltage
EN Threshold Hysteresis
Input Current
PWM LOGIC INPUT
Input High Level
Input Low Level
Logic-Input Current
0 ≤ V
PWM
≤ 5.5V
1
Note 2:
All units are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 3:
Once PVI exceeds undervoltage-lockout rising threshold 4.0V and the device is in regulation.
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