SC667 datasheet(3/47 Pages) SEMTECH

3 / 47 page

SC667

Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters

specified in the Electrical Characteristics section is not recommended.

NOTES:

(1) Subscripting for all LDOs (LDOn), n = 1, 2, 3, 4.

(2) Tested according to JEDEC standard JESD22-A114-B.

(3) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

Absolute Maximum Ratings

Pin Voltage — IN (V) . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0

Pin Voltage — All Other Pins (V) . . . . . . . . . -0.3 to (V

IN + 0.3)

LDOn(1) Short Circuit Duration . . . . . . . . . . . . . . .Continuous

ESD Protection Level(2)(kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5

Recommended Operating Conditions

Ambient Temperature Range (°C). . . . . . . . . .-40 ≤ T

A ≤ +85

Input Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . .2.9 ≤ V

IN ≤ 5.5

Backlight Sink Voltage (V) . . . . . . . . . . . . . . . .0.05≤V

BLn≤ 4.2

Thermal Information

Thermal Resistance, Junction to Ambient(3) (°C/W) . . . . 35

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

Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260

Unless otherwise noted, T

A = +25°C for Typ, -40ºC to +85°C for Min and Max, TJ(MAX) = 125ºC, VIN = 3.7V, CIN = CLDO1 = CLDO2 = CLDO3 = CLDO4 = 1.0µF,

BYP = 22nF, (ESR = 0.03Ω)

(1)

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Supply Specifications

Input Supply Voltage

2.9

5.5

Shutdown Current

Q(OFF)

Shutdown, V

IN = 4.2V

0.1

2.0

µA

Total Quiescent Current

Sleep (all LDOs off), EN = V

(2)

135

µA

Sleep (all LDOs on), EN = V

(2)

300

450

7 LEDs on

1.4

LED Sink Electrical Specifications

Maximum Total Backlight Current

OUT(MAX)

Sum of all active LED currents, V

IN above dropout level

175

Backlight Current Setting Range

Nominal setting for BL1 – BL7

Backlight Current Accuracy

BL_ACC

BLn

(3)

= 12mA

±1.5

Backlight Current Matching(4)

BL-BL

BLn

(3)

= 12mA

-3.5

±0.5

+3.5

Dropout Voltage(5)

One bank of 6 backlights set equal to 20mA

Current Sink Off-State Leakage Current

BL/FL(OFF)

IN = VBLn

(3)

= 4.2V

0.1

µA

Electrical Characteristics

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