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MAX8631YETI
(Rev.:2006)

1x/1.5x/2x White LED Charge Pump with Two LDOs in 4mm x 4mm Thin QFN

Maxim Integrated 

1x/1.5x/2x White LED Charge Pump with Two

LDOs in 4mm x 4mm Thin QFN

ABSOLUTE MAXIMUM RATINGS

PIN, IN, OUT, REFBP to GND................................-0.3V to +6.0V

SETF, SETM, ENLDO, ENM1, ENM2, ENF,

P1, P2, LDO1, LDO2 to GND....................-0.3V to (VIN + 0.3V)

M1, M2, M3, M4, F1, F2, F3, F4 to GND...-0.3V to (VOUT + 0.3V)

C1N, C2N to GND ......................................... -0.3V to (VIN + 1V)

C1P, C2P

to GND.............. -0.3V to greater of (VOUT + 1V) or (VIN + 1V)

PGND to GND .......................................................-0.3V to +0.3V

OUT, LDO1, LDO2 Short-Circuit to GND ...................Continuous

Continuous Power Dissipation (TA = +70°C)

28-Pin Thin QFN 4mm X 4mm

(derate 20.8mW/°C above +70°C) .............................1666mW

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

Junction Temperature ......................................................+150°C

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

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

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.

ELECTRICAL CHARACTERISTICS

(VIN = 3.6V, VGND = VPGND = 0V, ENM1 = ENM2 = ENF = IN, RSETM = RSETF = 6.8kΩ, P1 = P2 = unconnected, CREF = 0.01µF,

TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

CONDITIONS

IN Operating Voltage

Undervoltage-Lockout Threshold VIN rising or falling

Undervoltage-Lockout Hysteresis

1MHz switching, no load, 1.5x or 2x mode

Supply Current

1x mode 10% setting, ENF = GND, VENLDO = VIN,

ILDO1 = ILDO2 = 0A

MIN TYP MAX UNITS

2.7

5.5

V

2.25 2.45 2.60

V

130

mV

4.0

5.5

mA

0.4

Shutdown Supply Current

EN_ High Voltage

EN_ Low Voltage

EN_ Input Current

ENM_ or ENF Low Shutdown

Delay tSHDN

ENM_ or ENF tLO

ENM_ or ENF tHI

Initial ENM_ or ENF tHI

P1, P2 Shutdown Input Current

P1, P2 Input Impedance

Thermal-Shutdown Threshold

Thermal-Shutdown Hysteresis

CHARGE PUMP

Overvoltage-Protection Threshold

Soft-Start Time

ENM1 = ENM2 = ENF = GND, VENLDO = VIN,

ILDO1 = ILDO2 = 0A

ENM1 = ENM2 = ENF = ENLDO = GND TA = +25°C

TA = +85°C

VIN = 2.7V to 5.5V

VIN = 2.7V to 5.5V

VEN_ = 0V or 5.5V

TA = +25°C

TA = +85°C

See Figure 2

See Figure 2

See Figure 2

Only required for first ENM_ or ENF pulse, see Figure 2

Temperature rising

VOUT rising

110

µA

0.01

5

µA

0.1

1.4

V

0.4

V

0.01

1

µA

0.1

1.5

2

2.5

ms

0.5

250.0

µs

0.5

µs

200

µs

1

µA

150

kΩ

+160

°C

20

°C

5

V

2

ms

2 _______________________________________________________________________________________

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