SC662 datasheet(7/30 Pages) SEMTECH

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SC662

fPUMP = 1MHz, VOUT = 3.41V, CIN = COUT = C1 = C2 = 0.47µF (0402), TA = 25°C

VIN (V)

-3

-2

-1

2.7

3.3

3.6

3.9

4.2

Backlight Matching (6 LEDs) — 12mA Each

fPUMP = 1MHz, VOUT = 3.55V, CIN = COUT = C1 = C2 = 0.47µF (0402), TA = 25°C

VIN (V)

-3

-2

-1

2.7

3.3

3.6

3.9

4.2

Backlight Matching (6 LEDs) — 25mA Each

fPUMP = 1MHz, VOUT (see note), CIN = COUT = C1 = C2 = 0.47µF (0402), TA = 25°C

VIN (V)

-3

-2

-1

2.7

3.3

3.6

3.9

4.2

Backlight Matching (6 LEDs) — 5mA Each

fPUMP = 250kHz, VOUT = 3.55V, CIN = COUT = C1 = C2 = 1.0µF (0402), TA = 25°C

VIN (V)

-3

-2

-1

2.7

3.3

3.6

3.9

4.2

Backlight Matching (6 LEDs) — 25mA Each

fPUMP = 250kHz, VOUT = 3.41V, CIN = COUT = C1 = C2 = 1.0µF (0402), TA = 25°C

VIN (V)

-3

-2

-1

2.7

3.3

3.6

3.9

4.2

Backlight Matching (6 LEDs) — 12mA Each

VIN (V)

-3

-2

-1

2.7

3.3

3.6

3.9

4.2

fPUMP = 250kHz, VOUT (see note), CIN = COUT = C1 = C2 = 1.0µF (0402), TA = 25°C

Backlight Matching (6 LEDs) — 5mA Each

Typical Characteristics (continued)

(2)

Notes:

(1) Efficiency labels “Charge Pump” and “Backlight” are defined on page 13 under the sub-heading Charge Pump Efficiency.

(2) Plots shown for 5mA data have — V

OUT = 3.27V when in 1.5X and 2X modes, and VOUT = VIN - 55mV when in 1X mode. VOUT is

connected internally to V

IN only when the charge pump is in 1X mode and IBL ≤ 5mA.

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