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LTC4352CDD#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC4352
1
4352fa
Typical applicaTion
DescripTion
Low Voltage Ideal Diode
Controller with Monitoring
The LTC
®
4352 creates a near-ideal diode using an external
N-channel MOSFET. It replaces a high power Schottky diode
and the associated heat sink, saving power and board area.
The ideal diode function permits low loss power ORing
and supply holdup applications.
The LTC4352 regulates the forward voltage drop across
the MOSFET to ensure smooth current transfer in diode-
OR applications. A fast turn-on reduces the load voltage
droop during supply switch-over. If the input supply fails
or is shorted, a fast turn-off minimizes reverse currents.
The controller operates with supplies from 2.9V to 18V.
For lower voltages, an external supply is needed at the
V
CC
pin. Power passage is disabled during undervoltage
or overvoltage conditions. The controller also features an
open MOSFET detect circuit that flags excessive voltage
drop across the pass transistor in the on state. A REV pin
enables reverse current, overriding the diode behavior
when desired.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
2.9V to 18V Ideal Diode
FeaTures
applicaTions
n
Low Loss Replacement for Power Diode
n
Controls N-Channel MOSFET
n
0V to 18V Supply ORing or Holdup
n
0.5μs Turn-On and Turn-Off Time
n
Undervoltage and Overvoltage Protection
n
Open MOSFET Detect
n
Status and Fault Outputs
n
Hot Swappable
n
Reverse Current Enable Input
n
12-Pin MSOP and DFN (3mm × 3mm) Packages
n
Redundant Power Supplies
n
Supply Holdup
n
Telecom Infrastructure
n
Computer Systems and Servers
V
CC
UV
OV
REV
LTC4352
STATUS
FAULT
MOSFET ON
STATUS
0.1µF*
TO LOAD
2.9V TO 18V
Si7336ADP
*OPTIONAL
FAULT
0.1µF
4352 TA01
CPO V
IN
SOURCE GATE
GND
OUT
Power Dissipation vs Load Current
LOAD CURRENT (A)
0
0
POWER DISSIPATION (W)
2.5
2.0
1.5
1.0
0.5
4.0
3.0
3.5
2
4 6 8
4352 TA01b
10
DIODE (SBG1025L)
MOSFET (Si7336ADP)
POWER
SAVED
LTC4352
2
4352fa
absoluTe MaxiMuM raTings
V
IN
, SOURCE Voltages ...................................–2V to 24V
V
CC
Voltage .................................................. –0.3V to 7V
OUT Voltage ...................................................–2V to 24V
CPO, GATE Voltages (Note 3) ..................... –0.3V to 30V
CPO D.C. Current ...................................................10mA
UV, OV, REV Voltages ................................ –0.3V to 24V
FA U LT, STATUS Voltages ............................ –0.3V to 24V
(Notes 1, 2)
orDer inForMaTion
FA U LT, STATUS Currents ..........................................5mA
Operating Ambient Temperature Range
LTC4352C ................................................ 0°C to 70°C
LTC4352I .............................................–40°C to 85°C
LTC4352H .......................................... –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Package ...................................................... 300°C
pin conFiguraTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4352CDD#PBF LTC4352CDD#TRPBF LDPJ
12-Pin (3mm × 3mm) Plastic DFN
0°C to 70°C
LTC4352IDD#PBF LTC4352IDD#TRPBF LDPJ
12-Pin (3mm × 3mm) Plastic DFN
–40°C to 85°C
LTC4352HDD#PBF LTC4352HDD#TRPBF LDPJ
12-Pin (3mm × 3mm) Plastic DFN
–40°C to 150°C
LTC4352CMS#PBF LTC4352CMS#TRPBF 4352 12-Lead Plastic MSOP 0°C to 70°C
LTC4352IMS#PBF LTC4352IMS#TRPBF 4352 12-Lead Plastic MSOP –40°C to 85°C
LTC4352HMS#PBF LTC4352HMS#TRPBF 4352 12-Lead Plastic MSOP –40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TOP VIEW
DD PACKAGE
12-PIN (3mm × 3mm) PLASTIC DFN
12
13
11
8
9
10
4
5
3
2
1
SOURCE
GATE
CPO
GND
OUT
REV
V
IN
V
CC
UV
OV
STATUS
FAULT
6
7
1
2
3
4
5
6
V
IN
V
CC
UV
OV
STATUS
FAULT
12
11
10
9
8
7
SOURCE
GATE
CPO
GND
OUT
REV
TOP VIEW
MS PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 150°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) PCB GND CONNECTION OPTIONAL
T
JMAX
= 150°C, θ
JA
= 164°C/W
LTC4352
3
4352fa
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, V
SOURCE
= V
IN
, V
OUT
= V
IN
, V
CC
Open, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
IN
Input Operating Range
With External 2.9V to 4.7V V
CC
Supply
With External 4.7V to 6V V
CC
Supply
l
l
l
2.9
0
0
18
V
CC
18
V
V
V
V
CC(EXT)
V
CC
External Supply Range
l
2.9 6 V
V
CC(INT)
V
CC
Internal Regulator Voltage
l
3.5 4.1 4.7 V
I
IN
V
IN
Supply Current
V
IN
= 0V, V
CC
= 5V, V
OUT
= 18V
V
IN
= 0V, V
CC
= 5V, V
OUT
= 18V (LTC4352H)
l
l
l
1.4
–10
–10
3
–13
–25
mA
µA
µA
I
CC
External V
CC
Supply Current V
CC
= 5V, V
IN
= 0V
l
1.25 2.5 mA
V
CC(UVLO)
V
CC
Undervoltage Lockout Threshold V
CC
Rising
l
2.45 2.57 2.7 V
ΔV
CC(HYST)
V
CC
Undervoltage Lockout Hysteresis
l
50 70 90 mV
Ideal Diode Control
V
FWD(REG)
Forward Regulation Voltage (V
IN
− V
OUT
)
l
10 25 40 mV
ΔV
GATE
MOSFET Gate Drive (V
GATE
– V
SOURCE
) V
FWD
= 0.1V, I = 0 and –1μA
l
5 6.1 7.5 V
t
ON(GATE)
GATE Turn-On Delay C
GATE
= 10nF, V
FWD
= 0.2V
l
0.25 0.5 µs
t
OFF(GATE)
GATE Turn-Off Delay C
GATE
= 10nF, V
FWD
= −0.2V
l
0.2 0.5 µs
Input/Output Pins
V
UV,OV(TH)
UV, OV Threshold Voltage V
UV
Falling, V
OV
Rising
l
490 500 510 mV
ΔV
UV,OV(HYST)
UV, OV Threshold Hysteresis
l
2.5 5 8.5 mV
V
REV(TH)
REV Threshold Voltage
(LTC4352H)
l
l
0.8
0.8
1.0
1.0
1.2
1.25
V
V
I
UV,OV
UV, OV Current V = 0.5V
l
0 ±1 µA
I
REV
REV Current V
REV
= 1V
l
7 10 13 µA
I
OUT
OUT Current V
OUT
= 0V, 12V
l
–13 200 µA
I
SOURCE
SOURCE Current V
SOURCE
= 0V
l
–85 –130 µA
I
CPO(UP)
CPO Pull-Up Current V
CPO
= V
IN
= 2.9V
V
CPO
= V
IN
= 18V
l
l
–60
–50
–90
–75
–115
–100
µA
µA
I
GATE
GATE Fast Pull-Up Current
GATE Fast Pull-Down Current
GATE Off Pull-Down Current
V
FWD
= 0.2V, ΔV
GATE
= 0V, V
CPO
= 17V
V
FWD
= –0.2V, ΔV
GATE
= 5V
V
UV
= 0V, ΔV
GATE
= 2.5V
l
60
–1.5
1.5
100
145
A
A
µA
I
FLT,STAT(IN)
STATUS, FAULT Leakage Current V = 18V
l
0 ±1 µA
I
FLT,STAT(UP)
STATUS, FAULT Pull-Up Current V = 0V
l
–8 –10 –12 µA
V
OL
STATUS, FAULT Output Low Voltage I = 1.25mA
l
0.2 0.4 V
V
OH
STATUS, FAULT Output High Voltage I = –1μA
l
V
CC
– 1 V
CC
– 0.5 V
ΔV
GATE(ST)
MOSFET On Detect Threshold STATUS Pulls Low, V
FWD
= 50mV
STATUS Pulls Low, V
FWD
= 50mV (LTC4352H)
l
l
0.3
0.28
0.7
0.7
1.1
1.1
V
V
V
FWD(FLT)
Open MOSFET Threshold (V
IN
– V
OUT
) FAULT Pulls Low
l
200 250 300 mV
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating for extended periods may affect device reliability and
lifetime.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to GND unless otherwise
specified.
Note 3: Internal clamps limit the GATE and CPO pins to a minimum of 5V
above, and a diode below SOURCE. Driving these pins to voltages beyond
the clamp may damage the device.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC4352CDD#TRPBF

Mfr. #:
Buy LTC4352CDD#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Power Management Specialized - PMIC L V Ideal Diode Cntr w/ Mon ing
Lifecycle:
New from this manufacturer.
Delivery:
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