MAX17035 Datasheet, PDF (1/27 Pages) Maxim Integrated Products – High-Frequency, Low-Cost SMBus Chargers

19-4817; Rev 0; 7/09
EVAALVUAAILTAIOBNLEKIT
High-Frequency,
Low-Cost SMBus Chargers
General Description
The MAX17035/MAX17435/MAX17535 integrated multi-
chemistry battery chargers IC simplify construction
of accurate and efficient chargers. The MAX17035/
MAX17435/MAX17535 provide SMBusK-programmable
charge current, charge voltage, input current limit, relearn
voltage, and digital readback of the IINP voltage. The
MAX17035/ MAX17435/MAX17535 utilize a charge pump
to control the adapter selection n-channel MOSFETs
when the adapter is present. When the adapter is absent,
the charge pump is shut down and a p-channel MOSFET
selects the battery.
The MAX17035/MAX17435/MAX17535 provide up to 7A
of charge current to 2, 3, or 4 lithium-ion (Li+) cells in
series. The charge current, and input current-limit sense
amplifiers have low offset errors and can use 10mI
sense resistors. The MAX17035/MAX17435/MAX17535
fixed-inductor ripple architecture significantly reduces
component size and circuit cost.
The MAX17035/MAX17435/MAX17535 provide a digital
output that indicates the presence of the adapter, an
analog output that indicates the adapter or battery
current, depending upon the presence or absence of
the adapter, and a digital output that indicates when the
adapter current exceeds a user-defined threshold.
The MAX17035 operates with a switching frequency of
1.2MHz. The MAX17435 switches at 850kHz, and the
MAX17535 switches at 500kHz.
The MAX17035/MAX17435/MAX17535 are available in
a small, 4mm x 4mm x 0.75mm 24-pin, lead-free QFN
package. An evaluation kit is available.
Applications
Notebook Computers
PDAs and Mobile Communicators
2- to-4 Li+ Cell Battery-Powered Devices
Features
S Low-Cost SMBus Charger
S High Switching Frequency (1.2MHz, 0.85MHz,
0.5MHz)
S Internal Boost Switches
S SMBus-Programmable Charge Voltage, Input
Current Limit, Charge Current, Relearn Voltage,
and Digital IINP Readback
S Single-Point Compensation
S Automatic Selection of System Power Source
Adapter n-channel MOSFETs Driven by an
Internal Dedicated Charge Pump
Adapter Soft-Start
S ±0.4% Accurate Charge Voltage
S ±2.5% Accurate Input Current Limiting
S ±3% Accurate Charge Current
S Monitor Outputs for
AC Adapter Current (±2% Accuracy)
Battery Discharge Current (±2% Accuracy)
AC Adapter Presence
S AC Adapter Overvoltage Protection
S 11-Bit Battery Voltage Setting
S 6-Bit, Charge-Current Setting/Input Current Setting
S Improved IINP Accuracy at Low Input Current
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX17035ETG+*
-40^NC to +85NC 24 TQFN-EP**
MAX17435ETG+
-40^NC to +85NC 24 TQFN-EP**
MAX17535ETG+*
-40^NC to +85NC 24 TQFN-EP**
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
**EP = Exposed pad.
Pin Configuration
TOP VIEW
18 17 16 15 14 13
ACIN 19
12 CSIP
ITHR 20
11 CSIN
VAA 21
VCC 22
GND 23
MAX17035
MAX17435
MAX17535
10 ACOK
9 DH
8 LX
EN 24
7 BST
12 3456
SMBus is a trademark of Intel Corp.
________________________________________________________________ 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.