MAX17004 반도체 회로 부품 판매점
Main PowerSupply Controllers
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 Maxim Integrated |
19-0765; Rev 0; 3/07
EVAALVUAAILTAIOBNLEKIT
High-Efficiency, Quad-Output, Main Power-
Supply Controllers for Notebook Computers
General Description
The MAX17003/MAX17004 are dual step-down, switch-
mode, power-supply (SMPS) controllers with synchro-
nous rectification, intended for main 5V/3.3V power
generation in battery-powered systems. Fixed-frequen-
cy operation with optimal interleaving minimizes input
ripple current from the lowest input voltages up to the
26V maximum input. Optimal 40/60 interleaving allows
the input voltage to go down to 8.3V before duty-cycle
overlap occurs, compared to 180° out-of-phase regula-
tors where the duty-cycle overlap occurs when the
input drops below 10V.
Output current sensing provides peak current-limit pro-
tection, using either an accurate sense resistor or using
lossless inductor DCR current sensing. A low-noise
mode maintains high light-load efficiency while keeping
the switching frequency out of the audible range.
An internal, fixed 5V, 100mA linear regulator powers up
the MAX17003/MAX17004 and their gate drivers, as well
as external keep-alive loads. When the main PWM regu-
lator is in regulation, an automatic bootstrap switch
bypasses the internal linear regulator, providing current
up to 200mA. An additional adjustable linear-regulator
driver with an external pnp transistor may be used with a
secondary winding to provide a 12V supply, or powered
directly from the main outputs to generate low-voltage
outputs as low as 1V.
Independent enable controls and power-good signals
allow flexible power sequencing. Voltage soft-start grad-
ually ramps up the output voltage and reduces inrush
current, while soft-discharge gradually decreases the
output voltage, preventing negative voltage dips. The
MAX17003/MAX17004 feature output undervoltage and
thermal-fault protection. The MAX17003 also includes
output overvoltage-fault protection.
The MAX17003/MAX17004 are available in a 32-pin,
5mm x 5mm, thin QFN package. The exposed backside
pad improves thermal characteristics for demanding
linear keep-alive applications.
Applications
Main Power Supplies
2 to 4 Li+ Cell Battery-Powered Devices
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
Features
o Fixed-Frequency, Current-Mode Control
o 40/60 Optimal Interleaving
o Internal BST Switches
o Internal 5V, 100mA Linear Regulator
o Auxiliary Linear-Regulator Driver (12V or
Adjustable Down to 1V)
o Dual Mode™ Feedback—3.3V/5V Fixed or
Adjustable Output Voltages
o 200kHz/300kHz/500kHz Switching Frequency
o Undervoltage and Thermal-Fault Protection
o Overvoltage-Fault Protection (MAX17003 Only)
o 6V to 26V Input Range
o 2V ±0.75% Reference Output
o Independent Enable Inputs and Power-Good
Outputs
o Soft-Start and Soft-Discharge (Voltage Ramp)
o 8µA (typ) Shutdown Current
Ordering Information
PART
TEMP RANGE
MAX17003ETJ+ -40°C to +85°C
MAX17004ETJ+ -40°C to +85°C
+Denotes lead-free package.
PIN-
PACKAGE
32 Thin QFN
(5mm x 5mm)
32 Thin QFN
(5mm x 5mm)
PKG
CODE
T3255-4
T3255-4
Pin Configuration
TOP VIEW
24 23 22 21 20 19 18 17
DH3 25
16 DH5
BST3 26
15 BST5
DSCHG3 27
14 DSCHG5
CSL3 28
CSH3 29
FB3 30
MAX17003
MAX17004
13 CSL5
12 CSH5
11 FB5
FBA 31
OUTA 32
+
10 SKIP
9 FSEL
1 2345678
Dual Mode is a trademark of Maxim Integrated Products, Inc.
THIN QFN
5mm x 5mm
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
High-Efficiency, Quad-Output, Main Power-
Supply Controllers for Notebook Computers
ABSOLUTE MAXIMUM RATINGS
IN, SHDN, DRVA, OUTA to GND............................-0.3V to +28V
LDO5, ON3, ON5, ONA to GND ..............................-0.3V to +6V
PGDALL, DSCHG3, DSCHG5 to GND .....................-0.3V to +6V
CSL3, CSH3, CSL5, CSH5 to GND ..........................-0.3V to +6V
REF, FB3, FB5, FBA to GND...................-0.3V to (VLDO5 + 0.3V)
SKIP, FSEL, ILIM to GND........................-0.3V to (VLDO5 + 0.3V)
DL3, DL5 to PGND..................................-0.3V to (VLDO5 + 0.3V)
BST3, BST5 to PGND .............................................-0.3V to +34V
BST3 to LX3..............................................................-0.3V to +6V
DH3 to LX3 ..............................................-0.3V to (VBST3 + 0.3V)
BST5 to LX5..............................................................-0.3V to +6V
DH5 to LX5 ..............................................-0.3V to (VBST5 + 0.3V)
GND to PGND .......................................................-0.3V to +0.3V
BST3, BST5 LDO5 .................................................-0.3V to +0.3V
LDO Short Circuit to GND ..........................................Momentary
REF Short Circuit to GND ...........................................Momentary
DRVA Current (Sinking) ......................................................30mA
OUTA Shunt Current ...........................................................30mA
Continuous Power Dissipation (TA = +70°C)
Multilayer PCB
32-Pin, 5mm x 5mm TQFN
(derated 34.5mW/°C above +70°C) .........................2459mW
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
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
(Circuit of Figure 1, VIN = 12V, both SMPS enabled, FSEL = REF, SKIP = GND, ILIM = LDO5, FBA = LDO5, IREF = ILDO5 = IOUTA =
no load, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
INPUT SUPPLIES (Note 1)
VIN Input Voltage Range
VIN Operating Supply Current
VIN Standby Supply Current
VIN Shutdown Supply Current
Quiescent Power Consumption
MAIN SMPS CONTROLLERS
3.3V Output Voltage in Fixed
Mode
5V Output Voltage in Fixed Mode
Feedback Voltage in Adjustable
Mode (Note 2)
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VIN
IIN
IIN(STBY)
IIN(SHDN)
PQ
LDO5 in regulation
IN = LDO5, VCSL5 < 4.4V
LDO5 switched over to CSL5, either
SMPS on
VIN = 6V to 26V, both SMPS off, includes
ISHDN
VIN = 6V to 26V
Both SMPS on, FB3 = FB5 = LDO5,
SKIP = GND, VCSL3 = 3.5V, VCSL5 = 5.3V,
VOUTA = 15V,
PIN + PCSL3 + PCSL5 + POUTA
5.4
4.5
26.0
V
5.5
20 36 µA
65 120 µA
8 20 µA
3.5 4.5 mW
VOUT3
VOUT5
VFB_
VIN = 6V to 26V, SKIP = FB3 = LDO5,
0 < VCSH3 - VCSL3 < 50mV (Note 2)
VIN = 6V to 26V, SKIP = FB5 = LDO5,
0 < VCSH5 - VCSL5 < 50mV (Note 2)
VIN = 6V to 26V, FB3 or FB5
duty factor = 20% to 80%
VIN = 6V to 26V, FB3 or FB5
duty factor = 50%
3.265 3.315 3.365
4.94 5.015 5.09
1.980 2.010 2.040
1.990 2.010 2.030
V
V
V
2 _______________________________________________________________________________________
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MAX17004 controller
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