LM25085-Q1 datasheet(5/34 Pages) TI

tên linh kiện	LM25085-Q1

Giải thích chi tiết về linh kiện	LM25085 / -Q1 42V Constant On-Time PFET Buck Switching Controller

Download	34 Pages

Scroll/Zoom	100%

nhà sản xuất	TI [Texas Instruments]

Trang chủ	http://www.ti.com

Logo

5 / 34 page

LM25085, LM25085-Q1

www.ti.com

SNVS593J – OCTOBER 2008 – REVISED NOVEMBER 2014

6.6 Electrical Characteristics

Typical values correspond to TJ = 25°C. Minimum and maximum limits apply over –40°C to 125°C junction temperature

range, unless otherwise stated. VIN = 24V, RT = 100kΩ unless otherwise stated. (See

(1)).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIN PIN

IIN

Operating Current

Non-Switching, FB = 1.4V (2)

1.25

1.75

mA

IQ

Shutdown Current

RT = 0V (2)

175

300

µA

VCC REGULATOR (3)

VCC(reg)

VIN - VCC

Vin = 9V, FB = 1.4V, ICC = 0mA

6.9

7.7

8.5

V

Vin = 9V, FB = 1.4V, ICC = 20mA

7.7

V

Vin = 42V, FB = 1.4V, ICC = 0mA

7.7

V

UVLOVcc

VCC Under-Voltage Lock-Out

VCC Increasing

3.8

V

Threshold

UVLOVcc Hysteresis

VCC Decreasing

260

mV

VCC(CL)

VCC Current Limit

FB = 1.4V

20

40

mA

PGATE PIN

VPGATE(HI)

PGATE High Voltage

PGATE Pin = Open

VIN -0.1

VIN

V

VPGATE(LO)

PGATE Low Voltage

PGATE Pin = Open

VCC

VCC+0.1

V

VPGATE(HI)4.5

PGATE High Voltage at Vin = 4.5V

PGATE Pin = Open

VIN -0.1

VIN

V

VPGATE(LO)4.5

PGATE Low Voltage at Vin = 4.5V

PGATE Pin = Open

VCC

VCC+0.1

V

IPGATE

Driver Output Source Current

VIN = 12V, PGATE = VIN - 3.5V

1.75

A

Driver Output Sink Current

VIN = 12V, PGATE = VIN - 3.5V

1.5

A

RPGATE

Driver Output Resistance

Source current = 500mA

2.3

Ω

Sink current = 500mA

2.3

Ω

CURRENT LIMIT DETECTION

IADJ

ADJUST Pin Current Source

VADJ = 22.5V

32

40

48

µA

VCL OFFSET

Current Limit Comparator Offset

VADJ = 22.5V, VADJ - VISEN

-9

0

9

mV

RT PIN

RTSD

Shutdown Threshold

RT Pin Voltage Rising

0.73

V

RTHYS

Shutdown Threshold Hysteresis

50

mV

ON-TIME

tON – 1

On-Time

VIN = 4.5V, RT = 100kΩ

3.5

5

7.15

µs

tON – 2

VIN = 24V, RT = 100kΩ

560

720

870

ns

tON - 3

VIN = 42V, RT = 100kΩ

329

415

500

ns

tON - 4

Minimum On-Time in Current Limit

VIN = 24V, 25mV Overdrive at ISEN

55

140

235

ns

(4)

OFF-TIME

tOFF(CL1)

Off-Time (Current Limit) (4)

VIN = 12V, VFB = 0V

5.35

7.9

10.84

µs

tOFF(CL2)

VIN = 12V, VFB = 1V

1.42

1.9

3.03

µs

tOFF(CL3)

VIN = 24V, VFB = 0V

8.9

13

17.7

µs

tOFF(CL4)

VIN = 24V, VFB = 1V

2.22

3.2

4.68

µs

REGULATION AND OVER-VOLTAGE COMPARATORS (FB PIN)

VREF

FB Regulation Threshold

1.225

1.25

1.275

V

VOV

FB Over-Voltage Threshold

Measured With Respect to VREF

350

mV

IFB

FB Bias Current

10

nA

(1)

All hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying

statistical process control.

(2)

Operating current and shutdown current do not include the current in the RT resistor.

(3)

VCC provides self bias for the internal gate drive.

(4)

The tolerance of the minimum on-time (tON-4) and the current limit off-times (tOFF(CL1) through (tOFF(CL4)) track each other over process

and temperature variations. A device which has an on-time at the high end of the range will have an off-time that is at the high end of its

range.

Submit Documentation Feedback

5

Product Folder Links: LM25085 LM25085-Q1

Số phần tương tự - LM25085-Q1

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Texas Instruments	LM25085-Q1	1Mb / 30P	[Old version datasheet] LM25085, LM25085-Q1 42V Constant On-Time PFET Buck Switching Controller

More results

Mô tả tương tự - LM25085-Q1

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Texas Instruments	LM25085MME	1Mb / 30P	[Old version datasheet] LM25085, LM25085-Q1 42V Constant On-Time PFET Buck Switching Controller
National Semiconductor ...	LM25085	500Kb / 24P	42V Constant On-Time PFET Buck Switching Controller
Texas Instruments	LM25085A	1Mb / 31P	[Old version datasheet] 42V Constant On-Time PFET Buck Switching Controller
Texas Instruments	LM25085A	1Mb / 31P	[Old version datasheet] 42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
National Semiconductor ...	LM25085A	517Kb / 24P	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
National Semiconductor ...	LM5085	463Kb / 22P	75V Constant On-Time PFET Buck Switching Controller
Texas Instruments	LM5085	441Kb / 23P	[Old version datasheet] 75V Constant On-Time PFET Buck Switching Controller
	LM5085	1Mb / 33P	[Old version datasheet] 75V Constant On-Time PFET Buck Switching Controller
	LM34919C-Q1	1Mb / 29P	[Old version datasheet] LM34919C-Q1 Ultra Small 50V, 600 mA Constant On-Time Buck Switching Regulator
	LM5008A	1Mb / 22P	[Old version datasheet] 350 mA Constant On-Time Buck Switching Regulator

More results

LM25085-Q1 bảng dữ liệu(PDF) 5 Page - Texas Instruments

LM25085-Q1 bảng dữ liệu(HTML) 5 Page - Texas Instruments

Số phần tương tự - LM25085-Q1

Mô tả tương tự - LM25085-Q1

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

bảng dữ liệu tải về

Link URL