Operating Temperature Range ....................... -40NC to +105NC
Storage Temperature Range........................... -65NC to +150NC
Junction Temperature .....................................................+150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260
N
C
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFN-EP
Junction-to-Ambient Thermal Resistance (B
JA
) ..........40NC/W
Junction-to-Case Thermal Resistance (B
JC
) .................6NC/W
16 QSOP-EP
Junction-to-Ambient Thermal Resistance (B
JA
) ..........44NC/W
Junction-to-Case Thermal Resistance (B
JC
) .................6NC/W
16 QSOP
Junction-to-Ambient Thermal Resistance (B
JA
) ........105NC/W
Junction-to-Case Thermal Resistance (B
JC
) ...............37NC/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.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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
IN
= 14V, T
A
= T
J
= -40NC to +105NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.) (Note 2)
PARAMETER
POWER SWITCH/LDO
IN Operating Supply Range
IN Supply Current in Operation
IN Supply Current in Shutdown
IN Undervoltage Lockout
IN Undervoltage Lockout
Hysteresis
V
IN
I
IN
I
SD
V
UVL
V
UVL-HYS
Measured between IN and OUT1/OUT2,
I
OUT1/OUT2 =
100mA, FB1/FB2 = GND,
SW operation V
IN
R
5V, T
A
= +105NC
(Note 4)
Measured between IN and OUT1/OUT2,
I
OUT1/OUT2
= 100mA, FB1/FB2 = GND,
SW operation V
IN
R
5V, T
A
= +25NC
0.145
Over 19V, output and current sense is
switched off (Note 3)
Output switched off, for < 1s (Note 3)
V
SHDN1/SHDN2
> 2.8V, T
A
= +25NC
SHDN1
=
SHDN2
= GND, T
A
= +25NC,
V
IN
= 12V
V
IN
rising
V
IN
falling
3.8
390
2.1
4.5
28
45
3.4
7
4.8
4.45
mA
FA
V
mV
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0.3V
V
0.220
Voltage Drop of Internal Switch
V
IN
- V
OUT1/OUT2
Maxim Integrated
2
MAX16948
Automotive Dual Remote Antenna
Current-Sense LDO/Switch
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 14V, T
A
= T
J
= -40NC to +105NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.) (Note 2)
PARAMETER
Feedback Voltage
Input Bias Current to FB1 and
FB2
Feedback Threshold for
Internal Feedback Resistive
Divider
Adjustable Output Voltage
Range
FB1 and FB2 Load Regulation
SYMBOL
V
FB
I
FB1/FB2
V
FB1/FB2,TH
V
OUT1/OUT2
CONDITIONS
For LDO mode with external resistive
dividers, I
OUT1/OUT2_
= 5mA to 150mA
V
FB1/FB2
= 1.0V, LDO mode,
T
A
= +25NC
Switching to LDO mode with internal
8.5V resistive dividers
LDO mode with external resistive
dividers (Notes 3, 5)
V
IN
- V
OUT1/OUT2
R
2V,
I
OUT1/OUT2
= 5mA to 250mA,
LDO mode (Note 3)
V
IN
- V
OUT1/OUT2
R
2V,
I
OUT1/OUT2
= 50mA, LDO mode (Note 3)
I
OUT1/OUT2
= 70mA, LDO mode with
internal resistive divider, 9V < V
IN
< 18V
V
IN
- V
OUT1/OUT2
R
2V,
I
OUT1/OUT2
= 10mA at f = 100Hz,
LDO mode V
OUT1/OUT2
= 8.5V,
V
RIPPLE
= 0.5V
P-P
(Note 3)
I
OUT1/OUT2
= 100mA,
V
IN
= 5V, 19V
50mA
P
I
OUT1/OUT2
P
300mA, V
IN
R
5V
(Note 3)
SENSE1 to OUT1 and SENSE2
to OUT2 Current Ratio
V
SENSE1/SENSE2
< 3V
20mA
P
I
OUT1/OUT2
P
50mA, V
IN
R
5V
(Note 3)
5mA
P
I
OUT1/OUT2
P
20mA, V
IN
R
5V
(Note 3)
0mA
P
I
OUT1/OUT2
P
5mA, V
IN
R
5V
(Notes 3, 6)
No-Load Current-Sense Offset
SENSE1, SENSE2, LIM1, LIM2
Leakage Current
I
CSO
I
LEAK
I
OUT1 =
I
OUT2
= 0mA (Note 3)
SHDN1
=
SHDN2
= GND, T
A
=+ 25NC
8.33
MIN
0.97
-0.5
V
REG
-
1.7
1
TYP
1
MAX
1.03
+0.5
V
REG
-
0.8
12.5
UNITS
V
FA
V
V
DV
FB, LOAD
-7
mV
FB1 and FB2 Line Regulation
Fixed Output Voltage 8.5V
DV
FB, LINE
V
OUT1/OUT2, 8.5V
100
8.5
8.67
FV/V
V
Power-Supply Rejection Ratio
PSRR
73
dB
CURRENT SENSE
0.485
0.5
0.515
0.45
0.5
0.55
A
I
0.415
0.5
0.585
%
0.325
0.5
0.675
0.3
0.5
0.7
2
10
2
FA
FA
Maxim Integrated
3
MAX16948
Automotive Dual Remote Antenna
Current-Sense LDO/Switch
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 14V, T
A
= T
J
= -40NC to +105NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.) (Note 2)
PARAMETER
FAILURE DETECTION
LIM1 and LIM2 Current-Limit
Threshold Voltage
IN Overvoltage Lockout
Threshold (Rising)
IN Overvoltage Lockout
Threshold (Falling)
IN Overvoltage Lockout
Hysteresis
Short-to-BAT Threshold in Off
State
Reverse Current Detection
Level
Reverse Current (Short-to-BAT)
Shutdown Delay
V
LIM1/LIM2,TH
V
OVLO,R
V
OVLO,F
V
OVLO,H
V
S2B
I
REVCUR
t
PD-RC
V
OUT1/OUT2
- V
IN
, checked during turn-
on sequence
Power FET on (SW or LDO mode)
Delay to shutdown the switch or LDO
after drop over R
ON
becomes negative,
I
OUT1/OUT2
= -200mA (typ), T
A
= +25NC
Blanking time for reverse current and
FB1/FB2 out of range after rising edge
of
SHDN1, SHDN2,
or current limiting
event is over
LDO mode, internal pulldown resistor
switched on, FB rising
LDO mode, internal pulldown resistor
switched on (Note 3)
1.12
-500
-100
Voltage on LIM1 and LIM2 for which
output current is limited
V
IN
rising
V
IN
falling
2.375
19
18.5
600
-80
-50
+110
-1
2.5
21
2.625
23
V
V
V
mV
mV
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4.16
20
Fs
Reverse Current Blanking Time
t
BLK-RC
16
ms
Feedback Voltage Out of
Range
Feedback Voltage Out-of-
Range Hysteresis
Thermal Shutdown
Thermal Shutdown Hysteresis
V
FBERR
V
FBERR-HYS
1.15
39
1.28
100
V
mV
OVERTEMPERATURE PROTECTION (Note 3)
T
SHDN
T
SHDN-HYS
T
A
= +25NC, I
REG
= 0mA,
V
IN
= 4.5V to 18V
T
A
= +25NC, I
REG
= 0mA,
V
IN
= 6.5V to 18V
(Note 4)
Sinking current = 10mA
ERR1
and
ERR2
not asserted, V
ERR1/
ERR2
= 5V, T
A
= +25NC
V
SHDN1/SHDN2,HI
V
SHDN1/SHDN2,LO
2.8
0.8
160
15
NC
NC
SUPPORTING CIRCUITS, INTERFACE SIGNALS
4
4.5
15
0.4
1
5
5
5.5
5.5
V
V
mA
V
FA
V
V
4
Internal Voltage Regulator
V
REG
Internal Voltage Regulator
Current Limit
ERR1
and
ERR2
Output-
Voltage Low
ERR1
and
ERR2
Open-Drain
Leakage Current
SHDN1
and
SHDN2
High
SHDN1
and
SHDN2
Low
Maxim Integrated
I
REG
V
OL
MAX16948
Automotive Dual Remote Antenna
Current-Sense LDO/Switch
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 14V, T
A
= T
J
= -40NC to +105NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.) (Note 2)
PARAMETER
SHDN1
and
SHDN2
Pulldown
Resistance
Startup Response Time
OUT Pulldown Resistor
Note
Note
Note
Note
2:
3:
4:
5:
SYMBOL
R
SHDN
t
ST
R
OUT1/OUT2-OFF
CONDITIONS
V
SHDN1/SHDN2
= 2V
SHDN1
and
SHDN2
rising to turn on
LDO/switch (Note 3)
SHDN1
=
SHDN2
= GND
MIN
TYP
500
300
56
MAX
UNITS
kI
Fs
kI
Devices are tested at T
A
= +25NC and guaranteed by design for T
A
= T
MIN
to T
MAX
.
Guaranteed by design; not production tested.
Guaranteed by ATE characterization. Limits are not production tested.
In case of OUT1/OUT2 shorted to BAT, feedback network must protect FB1/FB2 from violating their absolute maximum rat-
ings. For OUT1/OUT2 set below 3.3V, use an additional 5V clamp on FB1/FB2 with low parasitic capacitance.
As time goes by, people are increasingly concerned about their own and their families' health. However, existing monitoring devices for individual vital signs have struggled to gain market share du...[详细]
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