SC493 datasheet(3/28 Pages) SEMTECH

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SC493

Absolute Maximum Ratings

BST to LX (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0

BST to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +35

LX to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +30

PVDD to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0

VIN to PGND (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +30

AVDD to AGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0

AGND to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3

All other pins to AGND (V). . . . . . . . . . . . . -0.3 to AVDD +0.3

ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Recommended Operating Conditions

Ambient Temperature (°C). . . . . . . . . . . . . . . . . . . . -40 to +85

Input Voltage VIN (V). . . . . . . . . . . . . . . . . . . . . . . . . 3.0 to 28

Controller Supply Voltage AVDD, PVDD (V). . . . .3.0 to 5.5

Output Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 to 5.0

Thermal Information

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

Maximum Junction Temperature (°C) . . . . . . . . . . . . . . . . 150

Operating Junction Temperature (°C) . . . . . . . . -40 to +125

Thermal Resistance, Junction to Ambient(2) (°C/W) . . . . 40

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

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

(2) 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.

Electrical Characteristics

Test Condition (unless otherwise noted): V

VDD(1)=5V, VIN=5V, TJ(MAX) = 125°C. Typ. values at 25°C, Min. and Max. at -40°C < TA < 85°C, VFBadj = 0%.

Parameter

Symbol

Condition

Min

Typ

Max

Units

Input Supply

VDD(1) Input Voltage

VDD

3.0

5.5

VDD(1) UVLO Threshold

VDD

UVLO

VDD rising

2.8

VDD(1) UVLO Hysteresis

VDD

UVLO_HYS

0.2

VDD(1) Supply Current

VDD

Shut down, EN pin = 0V

0.1

µA

I2C Standby, controller disabled

150

No switching, PSAVE, FB>0.5V

1000

sw = 25kHz, UPSAVE

Operating f

sw= 250kHz, no load

Switch-mode Controller

FB On-Time Threshold

VFB_TON

Static VIN and Load, no offset via I2C

0.496

0.5

0.504

On-Time Accuracy

Deviation from the ideal on-time to meet

the set switching frequency

-10

Minimum On Time

ON_MIN

100

Minimum Off Time

OFF_MIN

250

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