MAX8922LETB+T Maxim Integrated Products, MAX8922LETB+T Datasheet

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MAX8922LETB+T

Manufacturer Part Number
MAX8922LETB+T
Description
IC BATTERY CHARGER SGL 10TDFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8922LETBT.pdf (15 pages)

Specifications of MAX8922LETB+T

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
0 V ~ 28 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-TDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX8922L linear battery charger safely charges a
single-cell lithium-ion (Li+) battery. Charging rate is
optimized to accommodate the thermal characteristics
of a given application. There is no need to reduce the
maximum charge current at the worst-case charger
power dissipation. Charging is optimized for a single
Li+ cell using a control algorithm that includes low-bat-
tery precharging, voltage and current-limited fast
charging, and top-off charging, while continuously
monitoring for input overvoltage and device die-temper-
ature conditions. The fast-charge current and top-off
current thresholds are programmable by a simple
single-pin serial interface. The charger status and valid
input power are indicated by two open-drain outputs
(CHG and POK).
The fast-charge current is defaulted to 400mA and pro-
grammable through the single-pin interface (EN/SET).
The MAX8922L also can be programmable to GSM test
mode through the single-pin interface.
The MAX8922L is available in a tiny (3mm x 2mm x
0.8mm) 10-pin TDFN package.
19-4929; Rev 1; 4/10
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.
*EP = EXPOSED PAD.
TOP VIEW
GSM/EDGE/UMTS/CDMA Cell Phones
Digital Cameras
PDAs
Portable Media Players and MP3 Players
Wireless Appliances
with GSM Test Mode in 3mm x 2mm TDFN
________________________________________________________________ Maxim Integrated Products
(3mm x 2mm x 0.8mm)
10
1
General Description
9
2
MAX8922L
TDFN
Pin Configuration
8
3
7
4
*EP
Applications
6
5
30V Li+ Linear Battery Charger
o Overvoltage-Protected 30V
o Input Overvoltage-Protected Safe 4.94V LDO
o 2.3A GSM RF Test Mode
o No External FET, Blocking Diode, or Sense
o Single-Pin Easy Programmable Fast-Charge and
o Resistor-Programmable Fast-Charge Current
o Resistor-Programmable Top-Off Current
o Prequalification Charge
o Power-OK Monitor Output (POK)
o Charging-Status Output (CHG)
o Die Temperature Regulation for Optimized
o Tiny (3mm x 2mm x 0.8mm) 10-Pin TDFN Package
+ Denotes a lead(Pb)-free and RoHS-compliant package.
* EP = Exposed pad.
Note: This device operates in the -40°C to +85°C extended
operating temperature range.
MAX8922LETB+T
Output
Resistor Required
GSM Test Mode (EN/SET)
(SETI)
Threshold (MIN)
Charge Rate
PART
USB/AC ADAPTER
4.45V TO 30V
Typical Operating Circuit
R
R
SETI
MIN
PIN-PACKAGE
10 TDFN-EP*
EN\SET
Ordering Information
IN
SETI
MIN
EP
MAX8922L
GND
TEST
DC
CHG
LDO
POK
BAT
Rated Input (IN)
SYSTEM SUPPLY
TOP MARK
Features
AWN
1

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MAX8922LETB+T Summary of contents

Page 1

... Charging-Status Output (CHG) o Die Temperature Regulation for Optimized Charge Rate o Tiny (3mm x 2mm x 0.8mm) 10-Pin TDFN Package Applications PART MAX8922LETB+T + Denotes a lead(Pb)-free and RoHS-compliant package Exposed pad. Note: This device operates in the -40°C to +85°C extended operating temperature range. USB/AC ADAPTER ...

Page 2

Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN ABSOLUTE MAXIMUM RATINGS IN to GND ..............................................................-0.3V to +30V BAT, CHG, EN/SET, POK, SETI, MIN, LDO, TEST to GND ......................................-0. BAT Continuous ...

Page 3

GSM Test Mode in 3mm x 2mm TDFN ELECTRICAL CHARACTERISTICS (continued 5V 4V 0V, T EN/SET IN BAT A PARAMETER LDO Minimum LDO Bypass Capacitance LDO Regulated Output Voltage I LDO LDO Output-Current ...

Page 4

Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN ( 4V, MAX8922L Evaluation Kit. T EN/SET IN BAT SUPPLY CURRENT vs. SUPPLY VOLTAGE 1.0 0.9 0.8 0.7 0.6 ...

Page 5

GSM Test Mode in 3mm x 2mm TDFN ( 4V, MAX8922L Evaluation Kit. T EN/SET IN BAT BAT REGULATION VOLTAGE ACCURACY vs. AMBIENT TEMPERATURE 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 ...

Page 6

Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN IN 4.45V TO 30V Tj(DIE) +105°C 3.9V BAT 7.5V EN/SET BAT 2.5V Figure 1. MAX8922L Functional Diagram 6 _______________________________________________________________________________________ CC/CV REGULATOR TOP-OFF SWITCH CHARGE AND LOGIC ...

Page 7

GSM Test Mode in 3mm x 2mm TDFN Detailed Description The MAX8922L is designed to charge a single-cell Li+ battery from a DC source voltage between 4.45V and 7V, while V can withstand up to 30V. The fast-charge IN ...

Page 8

Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN ASYNCHRONOUS FROM ANYWHERE STANDBY MODE t = HIGH > 4ms EN/SET CHARGER = OFF POK = LOW CHG = HIGH IMPEDANCE PREQUALIFICATION PRECHARGE CURRENT POK = ...

Page 9

GSM Test Mode in 3mm x 2mm TDFN DC HIGH IMPEDANCE POK EN t SOFTSTART I FAST Figure 3. Charge-Current Programming The LDO is preset to an output voltage of 4.94V and a 100mA current limit (typ). The LDO ...

Page 10

Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN AC ADAPTER 1µF 1.87kΩ Figure 4. AC Adapter Charger Application Thermal Considerations The MAX8922L thermally enhanced TDFN pack- age with an exposed pad. ...

Page 11

GSM Test Mode in 3mm x 2mm TDFN USB CABLE 1.87kΩ Figure 5. USB-Powered Li+ Battery-Charger Application The universal serial bus (USB) provides a high-speed serial communications port as well as power for the remote device. The MAX8922L can ...

Page 12

Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN USB CABLE 1.87kΩ Figure 6. GSM Test Mode 12 ______________________________________________________________________________________ IN BAT C2 C1 1µF 68µF LDO MIN C3 1µF R1 VI/O MAX8922L SETI R2 POK ...

Page 13

GSM Test Mode in 3mm x 2mm TDFN For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show ...

Page 14

Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status ...

Page 15

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2010 Maxim Integrated Products ...

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