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PDF MAX17004 Data sheet ( Hoja de datos )
| Número de pieza | MAX17004 | |
| Descripción | Main PowerSupply Controllers | |
| Fabricantes | Maxim Integrated | |
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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.
1 page  
High-Efficiency, Quad-Output, Main Power-
Supply Controllers for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)
(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
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Output Undervoltage Protection
Trip Threshold
With respect to error-comparator
threshold
65 70 75
%
Output Undevoltage Fault
Propagation Delay
tUVP
50mV overdrive
10 µs
Output Undervoltage Protection
Blanking Time
PGDALL Lower Trip Threshold
PGDALL Propagation Delay
PGDALL Output Low Voltage
PGDALL Leakage Current
Thermal-Shutdown Threshold
GATE DRIVERS
DH_ Gate-Driver On-Resistance
DL_ Gate-Driver On-Resistance
DH_ Gate-Driver Source/Sink
Current
DL_ Gate-Driver Source Current
DL_ Gate-Driver Sink Current
Dead Time
Internal BST_ Switch On-
Resistance
BST_ Leakage Current
INPUTS AND OUTPUTS
SHDN Input Trip Level
ONA Logic Input Voltage
ON3, ON5 Input Voltage
DSCHG_ On-Resistance
DSCHG_ Leakage Current
tBLANK
tPGDALL
IPGDALL
tSHDN
From rising edge of ON_ with respect to
fSW
With respect to either SMPS error-
comparator threshold, hysteresis = 1% (typ)
Falling edge, 50mV overdrive
Rising edge, 50mV overdrive
ISINK = 1mA
High state, PGDALL forced to 5.5V
Hysteresis = 15°C
5000
-12
RDH
BST_ – LX_ forced to 5V
DL_, high state
RDL DL_, low state
IDH
DH_ forced to 2.5V, BST_ - LX_ forced to
5V
IDL (SOURCE) DL_ forced to 2.5V
IDL (SINK) DL_ forced to 2.5V
tDEAD
DH_low to DL_high
DL_low to DH_high
RBST
IBST = 10mA
VBST_ = 26V
15
15
RDSCHG_
Rising trip level
Falling trip level
Hysteresis = 600mV (typ)
High
Low
SMPS off level/clear fault level
Delay start level
SMPS on level
ON3 = ON5 = SHDN = 0; IDSCHG_ = 10mA
High state, DSCHG_ forced to 5.5V
1.1
0.96
2.4
1.9
2.4
5
6144
-10
10
1
+160
1.3
1.7
0.6
2
1.7
3.3
45
44
5
2
1.6
1
11
7000 1/fOSC
-8 %
µs
0.4 V
1 µA
°C
5Ω
5
Ω
3
A
A
A
ns
Ω
20 µA
2.2
V
1.04
V
0.8
0.8
2.1 V
25 Ω
1 µA
_______________________________________________________________________________________ 5
5 Page 
High-Efficiency, Quad-Output, Main Power-
Supply Controllers for Notebook Computers
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = 12V, SKIP = GND, FSEL = REF, TA = +25°C, unless otherwise noted.)
SOFT-START WAVEFORM
MAX17003/MAX17004 toc16
A
B
C
0
0D
0
0
2V E
0
F
0
G
0
400μs/div
A. AUX LDO OUTPUT
D. PGDALL, 5V/div
(VOUTA), 5V/div
ON3 = ON5, LDO5
B. 5V OUTPUT (VOUT5), 2V/div E. REF, 2V/div
C. 3.3V OUTPUT (VOUT3), 2V/div F. DL5, 5V/div
G. SHDN, 5V/div
SMPS DELAYED STARTUP SEQUENCE
3.3V
(ON3 = REF)
MAX17003/MAX17004 toc17
0A
5V
B
0
C
0
3.3V
D
0
0E
SMPS DELAYED STARTUP SEQUENCE
3.3V
(ON5 = REF)
MAX17003/MAX17004 toc18
0A
5V
B
0
C
0
3.3V
D
0
0E
1ms/div
A. ON5, 5V/div
B. 5V OUTPUT (VOUT5), 5V/div
C. PGOOD5, 5V/div
ON3 = REF
D. 3.3V OUTPUT (VOUT3),
5V/div
E. PGOOD3, 5V/div
1ms/div
A. ON3, 5V/div
B. 5V OUTPUT (VOUT5), 5V/div
C. PGOOD5, 5V/div
ON5 = REF
D. 3.3V OUTPUT (VOUT3),
5V/div
E. PGOOD3, 5V/div
SMPS SHUTDOWN WAVEFORM
MAX17003/MAX17004 toc19
3.3V
5V A
3.3V B
C
5V
D
0
0
0E
5V F
0
4ms/div
A. ON3, ON5, 5V/div
D. PGDALL, 5V/div
B. 5V OUTPUT (VOUT5), 2V/div E. DL5, 5V/div
C. 3.3V OUTPUT (VOUT3), 2V/div F. DL3, 5V/div
OUT5 LOAD TRANSIENT
MAX17003/MAX17004 toc20
5A
OUT3 LOAD TRANSIENT
MAX17003/MAX17004 toc21
3A
1A A 1A A
5.1V
3.35V
5.0V B 3.30V B
4.9V 3.25V
5A
1A C 3A C
1A
12V 12V
DD
00
20μs/div
A. IOUT5 = 1A TO 5A, 5A/div
B. VOUT5, 50mV/div
C. INDUCTOR CURRENT,
5A/div
D. LX5, 10V/div
20μs/div
A. IOUT3 = 1A TO 3A, 5A/div
B. VOUT3, 50mV/div
C. INDUCTOR CURRENT,
5A/div
D. LX3, 10V/div
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX17004.PDF ] | |
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