MAX8903NETI+T datasheet(2/30 Pages) MAXIM

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MAX8903A–E/G/H/J/N/Y

2A 1-Cell Li+ DC-DC Chargers

for USB and Adapter Power

Maxim Integrated

ELECTRICAL CHARACTERISTICS

(VDC = VUSB = 5V, VBAT = 4V, circuit of Figure 2, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

(Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

DC INPUT

DC Operating Range

4.15

No valid USB input

3.9

4.0

4.1

DC Undervoltage Threshold

When VDOK goes low, VDC

rising, 500mV typical hysteresis

Valid USB input

4.0

4.3

4.4

DC Overvoltage Threshold

When VDOK goes high, VDC rising, 500mV typical

hysteresis

16.5

17.5

Charger enabled, no switching, VSYS = 5V

2.3

Charger enabled, f = 3MHz, VDC = 5V

Charger enabled, VCEN = 0V, 100mA USB mode (Note 2)

Charger enabled, VCEN = 5V, 100mA USB mode (Note 2)

DC Supply Current

VDCM = 0V, VUSUS = 5V

0.10

0.25

DC High-Side Resistance

0.15

Ω

DC Low-Side Resistance

0.15

Ω

DC-to-BAT Dropout Resistance

Assumes a 40m

Ω inductor resistance (RL)

0.31

Ω

DC-to-BAT Dropout Voltage

When SYS regulation and charging stops, VDC falling,

200mV hysteresis

015

Minimum Off Time (tOFFMIN)

100

Minimum On Time (tONMIN)

VDC = 8V, VBAT = 4V

MAX8903A/B/C/D/E/H/J/Y

VDC = 5V, VBAT = 3V

VDC = 9V, VBAT = 4V

Switching Frequency (fSW)

MAX8903G

VDC = 9V, VBAT = 3V

MHz

DC Step-Down Output Current-

Limit Step Range

0.5

RIDC = 3k

Ω

1900

2000

2100

RIDC = 6k

Ω

950

1000

1050

DC Step-Down Output Current

Limit (ISDLIM)

VDC = 6V, VSYS = 4V

RIDC = 12k

Ω

450

500

550

ABSOLUTE MAXIMUM RATINGS

DC, LX to GND .......................................................-0.3V to +20V

DCM to GND ..............................................-0.3V to (VDC + 0.3V)

DC to SYS .................................................................-6V to +20V

BST to GND ...........................................................-0.3V to +26V

BST TO LX ................................................................-0.3V to +6V

USB to GND .............................................................-0.3V to +9V

USB to SYS..................................................................-6V to +9V

VL to GND ................................................................-0.3V to +6V

THM, IDC, ISET, CT to GND........................-0.3V to (VVL + 0.3V)

DOK, FLT, CEN, UOK, CHG, USUS,

BAT, SYS, IUSB, CS to GND ................................-0.3V to +6V

SYS to BAT ...............................................................-0.3V to +6V

PG, EP (exposed pad) to GND .............................-0.3V to +0.3V

DC Continuous Current (total in two pins) ......................2.4ARMS

USB Continuous Current.......................................................1.6A

LX Continuous Current (total in two pins).......................2.4ARMS

CS Continuous Current (total in two pins) ......................2.4ARMS

SYS Continuous Current (total in two pins) .......................3ARMS

BAT Continuous Current (total in two pins) .......................3ARMS

VL Short Circuit to GND .............................................Continuous

Continuous Power Dissipation (TA = +70°C)

28-Pin Thin QFN-EP

Multilayer (derate 28.6mW/°C above +70°C) ..........2286mW

28-Pin Thin QFN-EP

Single-Layer (derate 20.8mW/°C above +70°C)...1666.7mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature Range ............................-40°C to +150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow) .......................................+260°C

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