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MAX8552ETB+T

P1-P3P4-P6P7-P9P10-P11
General Description
The MAX8552 highly integrated monolithic MOSFET dri-
ver is capable of driving a pair of power MOSFETs in
single or multiphase synchronous buck-converter appli-
cations that provide up to 30A output current per
phase. The MAX8552 simplifies PC board layout in mul-
tiphase systems, particularly three phases and higher.
High input voltages up to 24V allow the MAX8552 to be
used in desktop, notebook, and server applications.
Each MOSFET driver is capable of driving 3000pF
capacitive loads with only 12ns propagation delay and
11ns (typ) rise and fall times, making the MAX8552
ideal for high-frequency applications.
User-programmable break-before-make circuitry pre-
vents shoot-through currents, maximizing converter effi-
ciency. An enable input allows total driver shutdown
(<1µA typ) for power-sensitive portable applications.
The PWM control input is compatible with TTL and
CMOS logic levels. The MAX8552, along with the
MAX8524 or the MAX8525 multiphase controllers, pro-
vides flexible 2-, 3-, 4-, 6-, or 8-phase CPU core-voltage
supplies.
The MAX8552 is available in space-saving 10-pin TDFN
and µMAX packages and is specified for -40°C to
+85°C operation.
Applications
Multiphase Buck Converters
Voltage Regulator Modules (VRMs)
Processor-Core Voltage Regulators
Desktops, Notebooks, and Servers
Switching Power Supplies
Features
♦ Single-Phase Synchronous Drivers
♦ Up to 24V (max) Input Voltage
♦ 0.1µA (typ) Quiescent Current in Shutdown Over
Temperature
♦ 0.5Ω/1.0Ω/0.7Ω/1.3Ω R
OUT
Drivers
♦ 12ns (typ) Propagation Delay
♦ 11ns (typ) Rise/Fall Times with 3000pF Load
♦ Adaptive Dead Time and User-Programmable
Delay Mode
♦ Up to 2MHz Operation with TDFN Package
♦ Up to 1.2MHz Operation with µMAX Package
♦ Enable Function
♦ TTL- and CMOS-Compatible Logic Inputs
♦ Available in a Space-Saving Thin DFN Package
MAX8552
High-Speed, Wide-Input,
Single-Phase MOSFET Driver
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
V
CC
GND
OFF
ON
DLY
PWM
BST
DH
LX
DL
PGND
MAX8552
EN
V
IN
6V TO 24V
V
OUT
1.45V AT 20A
V
CC
4.5V TO 6.5V
PWM CONTROL
SIGNAL
Typical Operating Circuit
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
19-2997; Rev 0; 10/03
PART TEMP RANGE PIN-PACKAGE
MAX8552EUB -40°C to +85°C 10 µMAX
MAX8552ETB -40°C to +85°C
10 TDFN
3mm x 3mm
Pin Configurations appear at end of data sheet.
3
.
0
m
m
x
3
.
0
m
m
8
-
P
I
N
T
D
F
N
MAX8552
High-Speed, Wide-Input,
Single-Phase MOSFET Driver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= V
BST
= V
DLY
= V
EN
= 5V, V
GND
= V
PGND
= V
LX
= 0V; T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
=
+25°C.) (Note 1)
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.
V
CC
to GND..............................................................-0.3V to +7V
PWM, EN, DL, DLY to GND........................-0.3V to (V
CC
+ 0.3V)
BST to PGND..........................................................-0.3V to +35V
LX to PGND ...............................................................-1V to +28V
DH to PGND..............................................-0.3V to (V
BST
+ 0.3V)
DH, BST to LX...........................................................-0.3V to +7V
DH and DL Continuous Current......................................±200mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ........444.4mW
10-Pin TDFN (derate 24.4mW/°C above +70°C) .......1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
UNDERVOLTAGE PROTECTION
V
CC
Supply Voltage Range 4.5 6.5 V
V
CC
rising 3.25 3.80
Undervoltage Lockout (UVLO) 0.25V hysteresis
V
CC
falling 3.0 3.5
V
PWM = GND or V
CC
,
T
A
= +25°C
0.04 1
Shutdown Supply Current V
EN
= 0V, V
CC
= 6.5V
PWM = GND or V
CC
,
T
A
= +85°C
0.1
µA
Idle Supply Current (I
CC
) No switching
V
CC
= 6.5V, PWM = GND,
R
DLY
= 47kΩ
330 500 µA
PWM = GND 25 50 µA
No switching
PWM = V
CC
23mA
Control Supply Current (I
GND
)
Switching
f
PWM
= 250kHz,
50% duty cycle
1.8 3 mA
PWM = GND 0.1 10 µA
No switching, I
CC
PWM = V
CC
1.2 2 mA
PWM = GND 0.1 10 µA
No switching, I
BST
PWM = V
CC
1.2 2
Driver Supply Current (I
PGND
)
Switching, I
BST
+ I
CC
250kHz 2 4
mA
DRIVER SPECIFICATIONS (See the Timing Diagram)
V
BST
= 4.5V 1.3 2.4
PWM = GND,
sourcing current
V
BST
= 5V 1.2
V
BST
= 4.5V 0.7 1.1
DH Driver Resistance
PWM = V
CC
,
sinking current
V
BST
= 5V 0.6
Ω
MAX8552
High-Speed, Wide-Input,
Single-Phase MOSFET Driver
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= V
BST
= V
DLY
= V
EN
= 5V, V
GND
= V
PGND
= V
LX
= 0V; T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
=
+25°C.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
= 4.5V 1.0 1.6
PWM = GND,
sourcing current
V
CC
= 5V 0.9
V
CC
= 4.5V 0.5 0.8
DL Driver Resistance
PWM = V
CC
,
sinking current
V
CC
= 5V 0.45
Ω
DH Rise Time (t
rDH
) PWM = V
CC
V
BST
= 5V, 3000pF load 14 ns
DH Fall Time (t
fDH
) PWM = GND V
BST
= 5V, 3000pF load 9 ns
DL Rise Time (t
rDL
) PWM = V
CC
V
CC
= 5V, 3000pF load 11 ns
DL Fall Time (t
fDL
) PWM = GND V
CC
= 5V, 3000pF load 8 ns
PWM falling (t
pDHf
)V
BST
= 5V 12
DH Propagation Delay
PWM = V
CC,
DL falling (t
pDHr
)
V
BST
= 5V 14
ns
PWM rising (t
pDLf
)9
DL Propagation Delay
PWM = GND,
LX falling (t
pDLr
)
V
BST
- V
LX
= 5V 16
ns
EN
V
PWM
= 0V or 6.5V, V
EN
= 0V or 6.5V,
V
CC
= 6.5V, T
A
= +25°C
0.01 1
Leakage Current
V
PWM
= 0V or 6.5V, V
EN
= 0V or 6.5V,
V
CC
= 6.5V, T
A
= +85°C
0.1
µA
Input-Voltage High Threshold V
CC
= 6.5V 2.5 V
Input-Voltage Low Threshold V
CC
= 4.5V 0.8 V
PWM
V
PWM
= 0V or 6.5V, V
EN
= 0V or 6.5V,
V
CC
= 6.5V, T
A
= +25°C
0.01 1
Leakage Current
V
PWM
= 0V or 6.5V, V
EN
= 0V or 6.5V,
V
CC
= 6.5V, T
A
= +85°C
0.1
µA
Input-Voltage High Threshold V
CC
= 6.5V 3.5 V
Input-Voltage Low Threshold V
CC
= 4.5V 1.2 V
Input Threshold Hysteresis 0.5 V
DLY
Delay Program Accuracy R
DLY
= 47kΩ, DL fall to DH rise 67.5 90.0 112.5 ns
Delay Disable-Detection
Threshold
4.0 4.7 V
Note 1: Specifications are production tested at T
A
= +25°C. Maximum and minimum limits are guaranteed by design and characterization.
P1-P3P4-P6P7-P9P10-P11

MAX8552ETB+T

Mfr. #:
Buy MAX8552ETB+T
Manufacturer:
Maxim Integrated
Description:
Gate Drivers Single-Phase MOSFET Driver
Lifecycle:
New from this manufacturer.
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