Operating Temperature Range ........................ -40NC to +105NC
Junction Temperature ...................................... -40NC to +150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-lay-
er 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
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
IN
= 12V, V
GND
= 0V, T
A
= -40NC to +105NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.)
PARAMETER
POWER SWITCH/LDO
Full performance
IN Operating Supply Range
V
IN
Output switched off (Note 2)
Output switched off for < 1s (Note 2)
IN Supply Current
IN Shutdown Supply Current
Undervoltage Lockout
(Rising)
I
CC
I
SD
V
UVLO
V
SHDN
> 2.4V, T
A
= +25NC
V
SHDN
= V
GND
, T
A
= +25NC, V
IN
= 12V
Falling V
IN
Rising V
IN
Hysteresis
Measured between SENS and OUT while
sourcing 100mA, FB grounded, SW
operation, T
A
= +25NC, 4.5V < V
IN
< 18V
Internal Switch Voltage Drop
V
SW
Measured between SENS and OUT while
sourcing 100mA, FB grounded, SW
operation, T
A
= +105NC, 4.5V < V
IN
< 18V
(Note 2)
I
REG
= 0mA, T
A
= +25NC
MAX16946 only,
LDO mode with
FB connected to
external resistive
divider
I
OUT
= 5mA to
150mA, 4.5V
P
V
IN
P
18V
I
OUT
= 2mA to
200mA, 4.5V
<
V
IN
P
18V
0.97
3.5
3.9
0.4
0.20
V
V
2.1
4.5
18
28
45
2.6
7
V
V
V
mA
FA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0.2
0.25
V
Internal Voltage Regulator
V
REG
5
1
1.03
V
V
Feedback Voltage
V
FB
0.95
1
1.05
V
2
Maxim Integrated
MAX16946/MAX16947
Remote Antenna, Current-Sense and
LDO/Switches
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, V
GND
= 0V, T
A
= -40NC to +105NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.)
PARAMETER
Feedback Input Bias Current
Fixed 8.5V to LDO Mode
Feedback Threshold
Adjustable Output Voltage
Range
FB Load Regulation
FB Line Regulation
Fixed 8.5V Output Voltage
Power-Supply Rejection
Ratio
Startup Response Time
OUT Pulldown Resistor Value
COMP Power-Down Resistor
Value
CURRENT-SENSE AMPLIFIER
AOUT Gain
Current-Sense Amplifier
Input Voltage Range
AOUT Zero-Current Output
Voltage
Maximum AOUT Voltage
AOUT Drive Capability
AOUT Leakage Current
SENS Leakage Current
REFERENCE
REF Output Voltage
REF Undervoltage
REF Output Current
REF Leakage Current
Open-Load Comparator
Input Common-Mode Range
Open-Load Comparator
Offset Voltage
V
REF
V
REF_UV
I
REF
I
REF_LEAK
V
SHDN
= V
GND
, T
A
= +25NC
4.5V < V
IN
< 18V
V
REF
falling
2.94
2.18
100
2
3
3.06
2.72
V
V
FA
FA
A
V
V
AOUT
/(V
IN
- V
SENS
), measured with
V
IN
- V
SENS
= 20mV and 100mV,
4.5V < V
IN
< 18V
Drop across the shunt resistor, normal
operation
(V
IN
- V
SENS
) = 0V, 4.5V < V
IN
< 18V
(V
IN
- V
SENS
) = 125mV, if V
LIM
= V
REF
then V
AOUT(MAX)
= 3V
(V
IN
- V
SENS
) = 30mV
V
SHDN
= V
GND
, T
A
= +25NC
V
SHDN
= V
GND
, T
A
= +25NC
1.0
2
2
25.35
26
26.65
V/V
V
OUT_8.5V
PSRR
t
ST
R
OUT_OFF
R
COMP_OFF
SYMBOL
I
FB
V
FB_TH
V
OUT
CONDITIONS
V
FB
= 1.0V, LDO mode, T
A
= +25NC
V
FB
= 1.0V, LDO mode, T
A
= +105NC
Switching to LDO mode from fixed 8.5V
LDO mode with external resistive divider,
V
IN
> V
OUT
+ V
DROPOUT
(Note 3)
V
IN
- V
OUT
R
2V, I
OUT
= 5mA to 100mA,
LDO mode
V
IN
- V
OUT
R
2V, I
OUT
= 6mA, LDO mode
I
OUT
= 5mA, LDO mode with internal
resistive divider, 9V
P
V
IN
P
18V
V
IN
- V
OUT
R
2V, f = 100Hz, LDO mode
SHDN
rising to switch/LDO on, time
needed to charge C
COMP
= 0.1FF
V
SHDN
= V
GND
, T
A
= +25NC
V
SHDN
= V
GND
, T
A
= +25NC
8.33
3.3
3.3
-2
20
8.5
50
10
250
120
8.67
MIN
-0.5
0
4.2
15
TYP
MAX
+0.5
UNITS
FA
V
V
%
mV/V
V
dB
ms
kI
kI
V
INR
V
AOUT_ZS
V
AOUT_FS
I
AOUT
I
AOUT_LEAK
I
SENS_LEAK
0
0.368
0.4
3.65
125
0.432
mV
V
V
mA
FA
FA
FAILURE DETECTION COMPARATORS
V
OLT_CMR
V
OLT_OS
(Note 2)
V
OLT
= 1.05V
0.4
-40
0
1.7
+40
V
mV
Maxim Integrated
3
MAX16946/MAX16947
Remote Antenna, Current-Sense and
LDO/Switches
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, V
GND
= 0V, T
A
= -40NC to +105NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.)
PARAMETER
OLT Input Bias Current
Initial Open-Load Blanking
Time
Open-Load Glitch Immunity
Current-Limit Comparator
Input Common-Mode Range
Current-Limit Comparator
Input Offset Voltage
LIM Input Bias Current
Short-Circuit AOUT Voltage
Threshold
Short-Circuit Current
Blanking Time
Delay Time Before Retry
After Short-Circuit Current
Turn-Off
IN Overvoltage Lockout
Threshold
Short-to-BAT Threshold in
Off-State
Reverse-Current Detection
Level
Reverse-Current Shutdown
Time
Feedback Voltage Out of
Range
Reverse-Current Blanking
Time for Short-Circuit Events
Thermal Shutdown Threshold
Thermal Shutdown
Hysteresis
LOGIC
SC, OL
Output-Voltage Low
SC, OL
Open-Drain Leakage
Current
V
OL
I
SC_LEAK
,
I
OL_LEAK
Sinking current = 1mA
SC, OL
not asserted, V
SC
= V
OL
= 5V,
T
A
= +25NC
0.4
1
V
FA
SYMBOL
I
OLT
t
OL
t
OL_GLITCH
V
LIM_CMR
V
LIM_OS
I
LIM_BIAS
CONDITIONS
V
OLT
= 1.05V, T
A
= +25NC
V
OLT
= 1.05V, T
A
= +105NC
A switched open load is blanked for t
OL
I
OUT
< I
OL
If V
LIM
is derived from REF then maximum
voltage at LIM is 3V (Note 2)
V
LIM
= 2.675V
V
LIM
= 2.675V, T
A
= +25NC
V
LIM
= 2.675V, T
A
= +105NC
Rising V
AOUT
at which the
SC
output
asserts low, hysteresis of 40mV,
4.5V < V
IN
< 18V
I
OUT
> I
SC
1.65
100
10
1.7
-80
-0.5
0
1.7
1.75
0
100
3.65
+80
+0.5
MIN
-0.5
0
TYP
MAX
+0.5
UNITS
FA
ms
Fs
V
mV
FA
V
SC
V
t
BLANK
100
ms
t
RETRY
I
OUT
> I
SC
1100
ms
V
OVLO
V
OUT_BAT
V
IN
rising, hysteresis = 0.5V (typ)
Short to battery detected when V
OUT
- V
IN
> V
OUT_BAT
Power switch on (SW or LDO mode), V
REV
= V
IN
- V
SENS,
V
REV
= -9.6mV produces
V
AOUT
= 150mV, V
REV
= -5.7mV
produces V
AOUT
= 250mV
Delay to shut down switch or LDO after
V
REV
exceeds -7.7mV (typ), T
A
= +25NC
LDO mode
Switching on and off into a temporary load
(short-circuit events)
19
0
21
250
23
500
V
mV
V
REV
-9.6
-5.7
mV
t
SD_REV
V
FB_ERR
t
REV_BLANK
5
1.12
16
1.28
Fs
V
ms
OVERTEMPERATURE PROTECTION
T
SHDN
T
HYST
+170
15
NC
NC
4
Maxim Integrated
MAX16946/MAX16947
Remote Antenna, Current-Sense and
LDO/Switches
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, V
GND
= 0V, T
A
= -40NC to +105NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.)
PARAMETER
SHDN
Input-Voltage High
SHDN
Input-Voltage Low
SHDN
Input Current
SHDN
Off-Time
SYMBOL
V
SHDN_HI
V
SHDN_LO
I
SHDN
t
SHDN_OFF
V
SHDN
> 6V
150
5
256
420
CONDITIONS
MIN
2.7
0.8
TYP
MAX
UNITS
V
V
FA
Fs
Note 2:
Guaranteed by design and not production tested.
Note 3:
V
DROPOUT
is voltage from V
IN
to V
OUT
and includes drop across the sense resistor and internal power FET. Additionally,
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