MAX15054AUT+T ,High-Side MOSFET Driver for HB LED Drivers and DC-DC ApplicationsApplicationsABSOLUTE MAXIMUM RATINGSV to GND .......-0.3V to +6V Thermal Resistance (Note 1)DDLX to ..
MAX15054AUT+T ,High-Side MOSFET Driver for HB LED Drivers and DC-DC ApplicationsELECTRICAL CHARACTERISTICS(V = V = 5V, V = V = 0V, T = T = -40°C to +125°C, unless otherwise noted. ..
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MAX1507ETA+ ,Linear Li+ Battery Charger with Integrated Pass FET and Thermal Regulation in 3mm x 3mm Thin DFNApplications MAX1507ETA-T -40°C to +85°C 8 Thin DFN-EP* AGWMAX1507ETA+T -40°C to +85°C 8 Thin DFN-E ..
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MAX4134 ,Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op AmpsFeaturesThe MAX4130–MAX4134 family of operational amplifiers♦ 6-Bump UCSP (MAX4131)combines 10MHz g ..
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MAX15054AUT+T
High-Side MOSFET Driver for HB LED Drivers and DC-DC Applications
High-Side MOSFET Driver for HB LED Drivers
and DC-DC Applications
MAX15054
General Description
The MAX15054 is a high-side, n-channel MOSFET driver
for high-voltage applications capable of switching at high
frequencies. This device is controlled by a CMOS logic-
level signal referenced to ground and features a very
short (12ns, typ) propagation delay from input to output.
The high-voltage operation and high source/sink-current
capability make the MAX15054 ideal for HB LED drivers
and DC-DC converters.
The MAX15054 is well suited to complement other Maxim
LED driver products such as the MAX16814, MAX16838,
MAX16833, MAX16834, and MAX16826. The MAX15054
adds a high-side driver to those products that include only a
low-side driver; it then allows for buck-boost configurations
for multistring drivers similar to the MAX16814, MAX16838,
and MAX16826, and for buck-boost conversion with output
referenced to ground for single-string drivers such as the
MAX16834 and MAX16833.
The MAX15054 is available in the industry-standard 6-pin
SOT23 package and operates over the -40NC to +125NC
automotive temperature range.
Applications
HB LED Drivers for Single and Multiple Strings
LED Backlight Drivers
High-Side Driver for DC-DC Converters
(Buck, Buck-Boost, Half-Bridge, Full-Bridge)
FeaturesInput Voltage on High-Side n-Channel MOSFET Up
to 60VUp to 13.5V Logic Input Independent of Supply
Voltage2A Peak Source and Sink Current12ns Propagation DelayRise and Fall Times of 6ns while Driving 1000pF
CapacitanceLow Input CapacitanceLow-Side and High-Side Undervoltage ProtectionAllows Buck-Boost Topology Referred to Ground
for LED Drivers and DC-DC ConvertersAllows Buck-Boost Topology for Multistring LED
Drivers6-Pin SOT23 Package
19-4747; Rev 0; 9/09
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
Ordering Information
PARTTEMP RANGEPIN-
PACKAGE
TOP
MARK
MAX15054AUT+-40NC to +125NC6 SOT23ACOM
Typical Operating Circuits
CBSTVDD
VIN
GNDHI
BST
HDRV
VCC
VDRV
DIM
COMP
DRAIN
OUT1
OUT2
ISET
FLT
SGNDPGNDGATENDRV
LEDGND
MAX15054
MAX16838R4CFB
Typical Operating Circuits continued at end of data sheet.
High-Side MOSFET Driver for HB LED Drivers
and DC-DC Applications
MAX15054
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.
VDD to GND .............................................................-0.3V to +6V
LX to GND ................................................................-2V to +65V
HDRV to LX ................................................-0.3V to (VDD + 0.3V)
BST to LX .................................................................-0.3V to +6V
HI to GND ..............................................................-0.3V to +15V
dV/dt at LX ........................................................................50V/ns
Peak Current into HDRV (< 100ns) ......................................Q2A
Continuous Current into HDRV .....................................Q100mA
Continuous Power Dissipation (TA = +70NC)
6-Pin SOT23 (derate 8.7mW/NC above +70NC) .........695.7mW
Thermal Resistance (Note 1)
Junction-to-Ambient Thermal Resistance (BJA) .........115NC/W
Junction-to-Case Thermal Resistance (BJC) ................80NC/W
Operating Temperature Range ........................-40NC to +125NC
Maximum Junction Temperature .....................................+150NC
Storage Temperature Range ............................-65NC to +150NC
Lead Temperature (soldering, 10s) .................................+300NC
ELECTRICAL CHARACTERISTICS
(VDD = VBST = 5V, VLX = VGND = 0V, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = TJ = +25°C,
unless otherwise noted.) (Note 2)
ABSOLUTE MAXIMUM RATINGS
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 /thermal-tutorial.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Operating Supply VoltageVDD4.65.5V
VDD Quiescent Supply CurrentIDDNo switching4075FA
BST Quiescent Supply CurrentIBSTNo switching65125FA
BST Operating Supply Current IBSTOfSW = 500kHz, no load0.31.3mA
VDD Undervoltage Lockout
ThresholdVDD_UVLOVDD rising3.924.224.56V
VDD Undervoltage Lockout
Threshold Hysteresis0.2V
BST-to-LX Undervoltage
Lockout Threshold
VBST_
UVLOBST rising3.543.824.1V
BST-to-LX Undervoltage
Lockout Threshold Hysteresis0.2V
LOGIC INPUT (HI)
HI Logic-High ThresholdVIH3.9V
HI Logic-Low ThresholdVIL1.8V
HI Logic-Input Hysteresis0.9V
HI Input CurrentIINHI = GND-2+2FA
HI Input ResistanceRIN300kI
DRIVER
LX Withstand VoltageVLX_MAX60V
BST Withstand VoltageVBST_MAX65V
LX Pulldown CurrentVLX = 2.5V5007401100FA
Driver Output Resistance
(Sourcing)RON_HPVBST - VLX = 4.5V,
100mA sourcing
TA = +25NC11.5ITA = +125NC1.252
Driver Output Resistance
(Sinking)RON_HNVBST - VLX = 4.5V,
100mA sinking
TA = +25NC0.751ITA = +125NC11.5
High-Side MOSFET Driver for HB LED Drivers
and DC-DC Applications
MAX15054
ELECTRICAL CHARACTERISTICS (continued)
(VDD = VBST = 5V, VLX = VGND = 0V, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = TJ = +25°C,
unless otherwise noted.) (Note 2)
Note 2: All devices are 100% production tested at TA = +25NC. Limits over the operating temperature range are guaranteed by
design.
Note 3: Guaranteed by design.
Figure 1. Turn-On/Turn-Off Propagation Delay
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Peak Output Current (Sourcing)IPK_HPVHDRV = 0V2.5A
Peak Output Current (Sinking)IPK_HNVHDRV = 5V2.5A
SWITCHING CHARACTERISTICS
Rise TimetR
No-load capacitor1.5CL = 1000pF6
CL = 5000pF18
Fall TimetF
No-load capacitor1.5CL = 1000pF6
CL = 5000pF16
Turn-On Propagation DelaytD_ONFigure 1, CL = 1000pF (Note 3)1125ns
Turn-Off Propagation DelaytD_OFFFigure 1, CL = 1000pF (Note 3)1125ns
VHI
VIH
VIL
tD_OFF
tD_ON
10%
90%
VHDRV
High-Side MOSFET Driver for HB LED Drivers
and DC-DC Applications
MAX15054
Typical Operating Characteristics
(VDD = VBST = 5V, VLX = VGND = 0V, TA = +25°C, unless otherwise noted.)
BST OPERATING SUPPLY CURRENT
vs. SWITCHING FREQUENCY
MAX15054 toc06
SWITCHING FREQUENCY (kHz)
BSTO
(µA)
0.110,000
NO LOAD ON HDRV
HI INPUT THRESHOLDS vs. TEMPERATURE
MAX15054 toc07
TEMPERATURE (NC)
INPUT THRESHOLD (V)
RISING
FALLING
POWER-UP AND POWER-DOWN SEQUENCE
MAX15054 toc04
HDRV
1V/div
VDD
1V/div
40µs/div
fSW = 5kHz AT HI
VDD, BST-LX QUIESCENT SUPPLY
CURRENT vs. SUPPLY VOLTAGE
MAX15054 toc05
SUPPLY VOLTAGE (V)
QUIESCENT CURRENT (µA)
TA = +125NC
IBST
IDD
TA = +85NC
TA = +25NC
TA = -40NC
VDD UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
MAX15054 toc01
TEMPERATURE (NC)
UVLO THRESHOLD (V)
VDD RISING
VDD FALLING
BST-LX UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
MAX15054 toc02
TEMPERATURE (°C)
UVLO THRESHOLD (V)
BST-LX FALLING
BST-LX RISING
POWER-UP AND POWER-DOWN SEQUENCE
MAX15054 toc03
HDRV
1V/div
VDD
1V/div
400µs/div
fSW = 5kHz AT HI
High-Side MOSFET Driver for HB LED Drivers
and DC-DC Applications
MAX15054
Typical Operating Characteristics (continued)
(VDD = VBST = 5V, VLX = VGND = 0V, TA = +25°C, unless otherwise noted.)
2MHz OPERATION
MAX15054 toc08
HDRV
2V/div
2V/div
200ns/div
NO LOAD ON HDRV
HDRV OUTPUT HIGH/LOW
vs. TEMPERATURE
MAX15054 toc09
TEMPERATURE (NC)
OUTPUT HIGH/LOW (V)
VBST - VHDRV
SOURCING 100mA
VHDRV - VLX
SINKING 100mA
OUTPUT HIGH = VBST - VHDRV
OUTPUT LOW = VHDRV - VLX
4% DUTY CYCLE AT 2MHz
MAX15054 toc10
10ns/div
2V/div
HDRV
2V/div
96% DUTY CYCLE AT 2MHz
MAX15054 toc11
2V/div
2V/div
10ns/div
TURN-ON/TURN-OFF PROPAGATION
DELAY vs. TEMPERATURE
MAX15054 toc12
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
tD_ON
tD_OFF
RISE TIME AND FALL TIME
MAX15054 toc13
2V/div
2V/div
20ns/div
HDRV
HDRV4.7nF CAPACITOR
CONNECTED FROM
HDRV TO GND,
LX = GND
TURN-ON AND TURN-OFF
PROPAGATION DELAY
MAX15054 toc14
1V/div
40ns/div
1nF CAPACITOR CONNECTED
FROM HDRV TO GND,
LX = GND
HDRV
High-Side MOSFET Driver for HB LED Drivers
and DC-DC Applications
MAX15054
Pin Description
Functional Diagram
Detailed Description
The MAX15054 n-channel MOSFET driver controls an
external high-side MOSFET in high-voltage, high-current
applications. This driver operates with a supply voltage of
4.6V to 5.5V, and consumes only 300FA of supply current
during typical switching operations (fSW = 500kHz) and
no-load conditions. The MAX15054 provides 2.5A (typ)
sink/source peak current and is capable of operating with
large capacitive loads and with switching frequencies
up to 2MHz. The device is used to drive the high-side
MOSFET without requiring an isolation device such as an
optocoupler or a drive transformer.
The high-side driver is controlled by a CMOS logic
referenced to ground and is powered by a bootstrap
circuit formed by an external diode and capacitor.
Undervoltage lockout (UVLO) protection is provided for
both the high- and low-side driver supplies (BST and
VDD) and includes a UVLO hysteresis of 0.2V (typ).
The MAX15054’s fast switching times and very short
propagation delays (11ns, typ) are ideal for high-
frequency applications. Internal logic circuitry prevents
shoot-through during output state changes and minimizes
package power dissipation.
LOW-SIDE
UVLO
HDRV
VDD
BST
EXTERNAL
GND
LEVEL
SHIFT UP
HIGH-SIDE
UVLO
LEVEL SHIFT
DOWN
MAX15054
PINNAMEFUNCTIONHI5V CMOS Logic Input. HI is referenced to GND and is capable of withstanding voltages up to 13.5V for
any VDD voltage. GNDGroundVDDInput Supply Voltage. Valid supply voltage ranges from 4.6V to 5.5V. Bypass VDD to GND with a 0.1FF
ceramic capacitor as close as possible to the device.BST
Boost Flying Capacitor Connection. Connect a minimum of a 0.1FF ceramic capacitor between BST
and LX for the high-side MOSFET driver supply. Connect a bootstrap Schottky diode between VDD
and BST.HDRVHigh-Side Gate-Driver Output. Driver output to drive the high-side external MOSFET gate.LXSource Connection for High-Side MOSFET. LX also serves as a return terminal for the high-side driver.
