LX2172/73

PRODUCT DA T ABOOK 1996/1997

3

Copyright © 1998

Rev. 0.4

a 12/04

ELECTRICAL CHARACTERISTICS

Reference Section

Parameter

Symbol

Test Conditions

Initial Accuracy

V

REF

T

Over Temperature, Measured at FB pin

Line Regulation

3V < V

Units

LX2172 / 2173

Min.

Typ.

Max.

1.224

1.244

1.264

V

1.214

1.244

1.274

V

0.03

% / V

Error Amplifier Section

Input Bias Current

I

B

T

Over Temperature

Open Loop Gain

A

VOL

Transconductance

g

m

T

Over Temperature

Output Sink Current

I

EA (SINK)

Output Source Current

I

EA (SOURCE)

Output HI Voltage

V

COMP-HI

V

Output LO Voltage

V

COMP-LO

V

Slew Rate

S

350

750

nA

1100

nA

500

1000

V / V

3000

4400

6000

µMHO

2400

7000

µMHO

120

200

µA

120

µA

1.8

2.1

2.3

V

0.2

0.3

0.52

V

2

V/µsec

(Unless otherwise specified, these specifications apply over the ranges T

V

All devices must be functional over

junction temperature of -65°C to 150°C. Typ. number represents T

Input Supply Section

Start-Up Threshold

Normal Mode Quiescent Current

I

Q

ENABLE = HI, V

V

3V < V

3V < V

Sleep Mode Current

ENABLE = HI, V

ENABLE = LO (LX2173 only)

2.2

2.7

2.9

V

58

mA

100

150

260

mV

50

300

mV

100

µA

5µA

Oscillator Section

Switching Frequency

f

T

Over Temperature

Line Voltage Stability

V

90

100

110

kHz

85

100

115

kHz

±5

%

Output Switch Breakdown Voltage

I

Output Switch On Resistance

R

ON

I

Switch Current Limit

I

LIM

D.C = 50%

50% < D.C < 80%

Total Switching Loss (On Time + Off Time)

V

0.6

1.2

1.25

V

36

40

%

80

90

98

%

E.A. Output to PWM Drive Offset (VPWM)

V

OFS

Duty Cycle = 0

Minimum Duty Cycle

Maximum Duty Cycle

65

V

0.4

0.6

Ω

1.25

1.7

2.8

A

1.0

1.5

2.0

A

100

mW

PWM Section

Output Drive Section

100

ns

2A / V

C.S. Delay to Driver Output

10% Over drive GBNT

V

C.S. Comparator Section