SC1155 查看數據表（PDF） - Semtech Corporation

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SC1155

PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE

Semtech Corporation 

SC1155

POWER MANAGEMENT

DC Electrical Characteristics (Cont.)

Parameter

High-Side Output Driver (1)

Peak Output Current

Symbol

Conditions

IsrcHIGHDR duty cycle < 2%, tpw < 100µs,

PRELIMINARY

Min Typ Max Units

2

A

Equivalent Output Resistance

Low-Side Output Driver (1)

IsinkHIGHDR TJ = 125°C

VBOOT - VBOOTLO = 6.5V, VHIGHDR = 1.5V (src)

or VHIGHDR = 5V (sink)

RsrcHIGHDR TJ = 125°C

VBOOT - VBOOTLO = 6.5V, VHIGHDR = 6V

RsinkHIGHDR TJ = 125°C

VBOOT - VBOOTLO = 6.5V, VHIGHDR = 0.5V

45

Ω

5

Peak Output Current

IsrcLOWDR duty cycle < 2%, tpw < 100us,

2

IsinkLOWDR TJ = 125°C

VDRV - VBOOTLO = 6.5V, VLOWDR = 1.5V (src)

or VLOWDR = 5V (sink)

Equivalent Output Resistance

RsrcLOWDR TJ = 125°C

VDRV = 6.5V, VLOWDR = 6V

RsinkLOWDR TJ = 125°C

VDRV = 6.5V, VLOWDR = 0.5V

AC Electrical Characteristics

(Note 1)

45

Ω

5

Hysteretic Comparators

Propagation Delay Time from

VSENSE to HIGHDR or

LOWDR (excluding

deadtime)

Output Drivers

tHCPROP

10mV overdrive,

1.3V ≤ Vref ≤ 1.8V

150 250 ns

HIGHDR rise/fall time

LOWDR rise/falltime

Overcurrent Protection

trHIGHDR

trHIGHDR

trLOWDR

tfLOWDR

CI = 9nF, VBOOT = 6.5V,

VBOOTLO = grounded,

TJ =125°C

CI = 9nF, VDRV = 6.5V,

TJ =125°C

60

ns

60

ns

Comparator Propagation

Delay Time

Deglitch Time (Includes

comparator propagation

delay time)

tOVPROP

tOVDGL

1

µs

2

5

µs

 2001 Semtech Corp.

5

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