MAX17017 Datasheet, PDF (1/31 Pages) Maxim Integrated Products – Quad-Output Controller for Low-Power Architecture

19-4121; Rev 2; 6/09
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Quad-Output Controller for
Low-Power Architecture
General Description
The MAX17017 is a quad-output controller for ultra-
mobile portable computers (UMPCs) that rely on a low-
power architecture. The MAX17017 provides a compact,
low-cost controller capable of providing four indepen-
dent regulators—a main stage, a 3A_P-P internal step-
down, a 5A_P-P internal step-down, and a 2A source/sink
linear regulator.
The main regulator can be configured as either a step-
down converter (for 2 to 4 Li+ cell applications) or as a
step-up converter (for 1 Li+ cell applications). The inter-
nal switching regulators include 5V synchronous
MOSFETs that can be powered directly from a single Li+
cell or from the main 3.3V/5V power stages. Finally, the
linear regulator is capable of sourcing and sinking 2A to
support DDR termination requirements or to generate a
fixed output voltage.
The step-down converters use a peak current-mode,
fixed-frequency control scheme—an easy to implement
architecture that does not sacrifice fast-transient
response. This architecture also supports peak current-
limit protection and pulse-skipping operation to maintain
high efficiency under light-load conditions.
Separate enable inputs and independent open-drain
power-good outputs allow flexible power sequencing. A
soft-start function gradually ramps up the output volt-
age to reduce the inrush current. Disabled regulators
enter high-impedance states to avoid negative output
voltage created by rapidly discharging the output
through the low-side MOSFET. The MAX17017 also
includes output undervoltage, output overvoltage, and
thermal-fault protection.
The MAX17017 is available in a 48-pin, 6mm x 6mm
thin QFN package.
Applications
1-to-4 Li+ Cell Battery-Powered Devices
Low-Power Architecture
Ultra-Mobile PC (UMPC)
Portable Gaming
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
Features
o Fixed-Frequency, Current-Mode Controllers
o 5.5V to 28V Input Range (Step-Down) or 3V to 5V
Input Range (Step-Up)
o 1x Step-Up or Step-Down Controller
o 1x Internal 5A_P-P Step-Down Regulator
o 1x Internal 3A_P-P Step-Down Regulator
o 1x 2A Source/Sink Linear Regulator with Dynamic
REFIN
o Internal BST Diodes
o Internal 5V, 50mA Linear Regulator
o Fault Protection—Undervoltage, Overvoltage,
Thermal, Peak Current Limit
o Independent Enable Inputs and Power-Good
Outputs
o Voltage-Controlled Soft-Start
o High-Impedance Shutdown
o 10µA (typ) Shutdown Current
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX17017GTM+
-40°C to +105°C 48 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration
TOP VIEW
36 35 34 33 32 31 30 29 28 27 26 25
ONB 37
24 CSPA
SYNC 38
23 CSNA
ONA 39
22 AGND
INBC 40
21 REF
INBC 41
INBC 42
MAX17017
20 FREQ
19 UP/DN
INBC 43
18 INA
V_DD 44
17 V_CC
POKD 45
16 BYP
OND 46
15 LDO5
ONC 47
14 INLDO
FBC 48
EXPOSED PAD = GND
13 SHDN
+
1 2 3 4 5 6 7 8 9 10 11 12
THIN QFN
________________________________________________________________ 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.