IC PMIC W/CHARGER 40-TQFN

MAX8671XETL+

Manufacturer Part NumberMAX8671XETL+
DescriptionIC PMIC W/CHARGER 40-TQFN
ManufacturerMaxim Integrated Products
MAX8671XETL+ datasheet
 


Specifications of MAX8671XETL+

FunctionCharge ManagementBattery TypeLithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
Voltage - Supply4.1 V ~ 6.6 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case40-WFQFN Exposed Pad
Mounting StyleSMD/SMTInput Voltage2.6 V to 6.6 V
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Output Current0.5 AOutput Voltage0.6 V to 5 V
Supply Current0.285 mALead Free Status / RoHS StatusLead free / RoHS Compliant
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19-0885; Rev 0; 8/07
PMIC with Integrated Charger and
Smart Power Selector for Handheld Devices
General Description
The MAX8671X integrated power-management IC
(PMIC) is ideal for use in portable media players and
other handheld devices. In addition to five regulated
output voltages, the MAX8671X integrates a 1-cell lithi-
um ion (Li+) or lithium polymer (Li-Poly) charger and
Smart Power Selector™ with dual (AC-to-DC adapter
and USB) power inputs. The dual-input Smart Power
Selector supports end products with dual or single
power connectors. All power switches for charging and
switching the system load between battery and external
power are included on-chip. No external MOSFETs are
required.
Maxim’s Smart Power Selector makes the best use of
limited USB or AC-to-DC adapter power. Battery
charge current and input current limit are independent-
ly set. Input power not used by the system charges the
battery. Charge current and DC current limit are pro-
grammable up to 1A while USB input current can be set
to 100mA or 500mA. Automatic input selection switches
the system load from battery to external power. Other
features include overvoltage protection, charge status
and fault outputs, power-OK monitors, charge timer,
and battery thermistor monitor. In addition, on-chip
thermal limiting reduces battery charge rate to prevent
charger overheating.
The MAX8671X offers adjustable voltages for all out-
puts. Similar parts with factory-preset output voltages
are also available (contact factory for availability).
Portable Audio Players
GPS Portable Navigators
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
________________________________________________________________ Maxim Integrated Products
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.
♦ 16V-Tolerant USB and DC Inputs
♦ Automatically Powers from External Power or
Battery
♦ Operates with No Battery Present
♦ Single-Cell Li+/Li-Poly Charger
♦ Three 2MHz Step-Down Regulators
Up to 96% Efficiency
♦ Two Low I
♦ Output Power-Up Sequencing
♦ Thermal-Overload Protection
PART
MAX8671XETL+ -40°C to +85°C
+ Denotes a lead-free package.
* EP = Exposed paddle.
Simplified Applications Circuit
AC-TO-DC
ADAPTER
Applications
USB
ON
OFF
μP
Features
Linear Regulators
Q
Ordering Information
TEMP RANGE PIN-PACKAGE
40 Thin QFN-EP*
5mm x 5mm
MAX8671X
DC
SYS
USB
+
Li+/LiPo
BATTERY
EN
OUT1
OUT1
1V TO V
PWM
425mA
OUT2
OUT2
1V TO V
PEN1
425mA
PEN2
USUS
OUT3
CEN
OUT3
1V TO V
425mA
OUT4
CST1
OUT4
0.6V TO V
SYS
CST2
180mA
DOK
UOK
OUT5
0.6V TO V
OUT5
SYS
180mA
PKG
CODE
T4055-1
SYS
SYS
SYS
1

MAX8671XETL+ Summary of contents

  • Page 1

    ... Operates with No Battery Present ♦ Single-Cell Li+/Li-Poly Charger ♦ Three 2MHz Step-Down Regulators Up to 96% Efficiency ♦ Two Low I ♦ Output Power-Up Sequencing ♦ Thermal-Overload Protection PART MAX8671XETL+ -40°C to +85°C + Denotes a lead-free package Exposed paddle. Simplified Applications Circuit AC-TO-DC ADAPTER Applications USB ...

  • Page 2

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 3

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Tables Table 1. Input Limiter Control Logic . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 4

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ABSOLUTE MAXIMUM RATINGS USB, DC, PEN1 to AGND.......................................-0.3V to +16V SYS, BAT, PV1, PV2, PV3 to AGND..........................-0.3V to +6V PG1, PG2, PG3, AGND .........................................-0.3V to +0.3V PV1, PV2, PV3 ...

  • Page 5

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ELECTRICAL CHARACTERISTICS (continued) (DC, USB, BVSET, UOK, DOK, LX_ unconnected 3.3V 0V, C PEN1 PEN2 PWM OUT4 R = 3kΩ ...

  • Page 6

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ELECTRICAL CHARACTERISTICS (continued) (DC, USB, BVSET, UOK, DOK, LX_ unconnected 3.3V 0V, C PEN1 PEN2 PWM OUT4 R = 3kΩ ...

  • Page 7

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ELECTRICAL CHARACTERISTICS (continued) (DC, USB, BVSET, UOK, DOK, LX_ unconnected 3.3V 0V, C PEN1 PEN2 PWM OUT4 R = 3kΩ ...

  • Page 8

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ELECTRICAL CHARACTERISTICS (continued) (DC, USB, BVSET, UOK, DOK, LX_ unconnected 3.3V 0V, C PEN1 PEN2 PWM OUT4 R = 3kΩ ...

  • Page 9

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ELECTRICAL CHARACTERISTICS (continued) (DC, USB, BVSET, UOK, DOK, LX_ unconnected 3.3V 0V, C PEN1 PEN2 PWM OUT4 R = 3kΩ ...

  • Page 10

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ELECTRICAL CHARACTERISTICS (continued) (DC, USB, BVSET, UOK, DOK, LX_ unconnected 3.3V 0V, C PEN1 PEN2 PWM OUT4 R = 3kΩ ...

  • Page 11

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ELECTRICAL CHARACTERISTICS (continued) (DC, USB, BVSET, UOK, DOK, LX_ unconnected 3.3V 0V, C PEN1 PEN2 PWM OUT4 R = 3kΩ ...

  • Page 12

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices ELECTRICAL CHARACTERISTICS (continued) (DC, USB, BVSET, UOK, DOK, LX_ unconnected 3.3V 0V, C PEN1 PEN2 PWM OUT4 R = 3kΩ ...

  • Page 13

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices (Circuit of Figure 0mA +25°C, unless otherwise noted QUIESCENT CURRENT vs USB SUPPLY VOLTAGE 1.6 CHARGER ENABLED 1.4 NO BATTERY ...

  • Page 14

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices (Circuit of Figure 0mA +25°C, unless otherwise noted CHARGE CURRENT vs. BATTERY VOLTAGE WITH USB INPUT 500 V = 5.0V USB 450 ...

  • Page 15

    Smart Power Selector for Handheld Devices (Circuit of Figure 0mA +25°C, unless otherwise noted USB CONNECT (NO SYS LOAD) MAX8671X toc14 V 5V/div USB 500mA/div I USB 4.14V 4.0V 2V/div V SYS V ...

  • Page 16

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices (Circuit of Figure 0mA +25°C, unless otherwise noted AC-TO-DC ADAPTER CONNECT WITH USB MAX8671X toc19 V 4.14V 4.0V SYS 5V/div 1A 500mA/div ...

  • Page 17

    Smart Power Selector for Handheld Devices (Circuit of Figure 0mA REG1 EFFICIENCY vs. LOAD CURRENT 100 90 80 PWM = 2.8V OUT1 PWM = 1 V ...

  • Page 18

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices (Circuit of Figure 0mA +25°C, unless otherwise noted REG2 EFFICIENCY vs. LOAD CURRENT 100 PWM = ...

  • Page 19

    Smart Power Selector for Handheld Devices (Circuit of Figure 0mA REG4 LOAD REGULATION 2.554 R = 316kΩ FBH 2.552 R = 100kΩ FBL 2.550 2.548 2.546 2.544 2.542 2.540 2.538 2.536 ...

  • Page 20

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices PIN NAME USB Suspend Digital Input. As shown in Table 1, driving USUS high suspends the DC or USB inputs 1 USUS if they are configured as a USB ...

  • Page 21

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices PIN NAME 23 LX1 Inductor Switching Node for REG1. LX1 is internally pulled to PG1 by 1kΩ in shutdown. 24 PG1 Power Ground for the REG1 Step-Down Regulator 25 ...

  • Page 22

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices AC-TO-DC ADAPTER VBUS 3.3V 3mA VL 1.8V 180mA OUT4 121kΩ 2.2μF 60.4kΩ 3.3V 180mA OUT5 274kΩ 2.2μF 60.4kΩ ON OFF IO μP 4x 560kΩ 5% Figure 1. MAX8671X Typical ...

  • Page 23

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices DC DOK DISET PEN1 PEN2 USUS UOK USB HIGHEST VOLTAGE SELECTOR VL AGND PV4 OUT4 FB4 BP PV5 OUT5 FB5 EN PWM Figure 2. Functional Diagram ______________________________________________________________________________________ Li+/Li-Poly BATTERY ...

  • Page 24

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Detailed Description The MAX8671X highly integrated PMIC is ideally suited for use in portable audio player and handheld applica- tions. As shown in Figure 2, the MAX8671X integrates USB ...

  • Page 25

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices with a single power input to operate from either an AC- to-DC adapter or USB host (see Table 1). A thermal-limiting circuit reduces the battery charger rate and external ...

  • Page 26

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices USB Power-OK Output (UOK) As shown Figure 3, the USB power-OK output (UOK active-low open-drain output. The UOK output pulls low when the voltage from USB to ...

  • Page 27

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices To support common 500mA to 1000mA wall adapters at the DC input, pull PEN1 high. With PEN1 pulled high, the DC current limit is set by an external resistor ...

  • Page 28

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices DC V DCL 4.0V RISING (TYP) 500mV HYST V DCH 6.9V RISING (TYP) 400mV HYST Figure 5. DC Power-OK Logic Figure 6 shows the typical Li+/Li-Poly charge profile for ...

  • Page 29

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices PREQUALIFICATION V BATREG V BATPRQ I CHGMAX HIGH-Z LOW Figure 6. Li+/Li-Poly Charge Profile ______________________________________________________________________________________ FAST-CHARGE FAST-CHARGE (CONSTANT CURRENT) (CONSTANT VOLTAGE) CST[1: ...

  • Page 30

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices 1. 2000 CHGMAX R CISET THERMISTOR SUSPEND I = 0mA CHG THM OUT OF RANGE CST[1: SUSPENDS TIMER UOK AND/OR DOK = 1 ...

  • Page 31

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Table 3. Charge Status Outputs CST1 CST2 CHARGING 0 0 Yes Note: CST1 and CST2 are active-low, open-drain outputs. “0” ...

  • Page 32

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Table 5. Ideal Charge Currents vs. Charge Setting Resistor R (kΩ) I (mA) I CISET CHGMAX PQ 3.01 1000 4.02 746 4.99 601 6.04 497 6.98 430 8.06 372 ...

  • Page 33

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices The MAX8671X uses external resistor-dividers to set the step-down output voltages between 1V and V least 10µA of bias current in these dividers to ensure no change in the ...

  • Page 34

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Step-Down Inductor Choose the step-down regulator inductance to be 4.7µH. The minimum recommended saturation current requirement is 600mA. In PWM mode, the peak induc- tor currents are equal to ...

  • Page 35

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices TO FIND THE MAXIMUM OUTPUT CURRENT FOR REG WITH V ± = Ω AND R 130 OUT = ...

  • Page 36

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices SYS SYSOK 2.5V FALLING 100mV HYST PV4 PV4OK 1.6V RISING 100mV HYST PV5 PV5OK 1.6V RISING 100mV HYST USB USBOVLO 6.9V RISING 400mV HYST USBUVLO 4.0V RISING 500mV HYST ...

  • Page 37

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices USB SYS BAT OUT1 V OUT2 t SS3 V OUT3 V OUT4 V OUT5 HIGH-Z V UOK HIGH-Z V ...

  • Page 38

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Active Discharge in Shutdown Each MAX8671X regulator (REG1–REG5) has an inter- nal 1kΩ resistor that discharges the output capacitor when the regulator is off. The discharge resistors ensure that ...

  • Page 39

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Overvoltage lockout (OVLO) prevents an input supply from being used when its voltage exceeds the operat- ing range. Both USB and DC withstand input voltages up to 14V. When ...

  • Page 40

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Table 8. Trip Temperatures for Different Thermistors THERMISTOR BETA (ß [K]) R (kΩ (kΩ (kΩ) TS Resistance at +25°C [kΩ] Resistance at +50°C [kΩ] Resistance ...

  • Page 41

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices THM threshold adjustment can be accommodated by changing R , connecting a resistor in series and/ parallel with the thermistor, or using a thermistor with dif- ferent ...

  • Page 42

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices Pin Configuration TOP VIEW CISET THM BAT 34 35 SYS MAX8671X 36 PEN1 CST2 37 38 ...

  • Page 43

    PMIC with Integrated Charger and Smart Power Selector for Handheld Devices (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information 43 ...

  • Page 44

    ... 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. 44 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Package Information (continued registered trademark of Maxim Integrated Products ...