LX1662CD datasheet(3/15 Pages) MICROSEMI

Part #	LX1662CD

Description	SINGLE-CHIP PROGRAMMABLE PWM CONTROLLERS WITH 5-BIT DAC

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Manufacturer	MICROSEMI [Microsemi Corporation]

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SINGLE-CHIP PROGRAMMABLE PWM CONTROLLERS WITH 5-BIT DAC

LX1662/62A, LX1663/63A

PRODUCT DA T ABOOK 1996/1997

3

Rev. 1.1 11/99

P RODUCTION D ATA S HEET

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, 10.8 < V

CC < 13.2, 0°C ≤ TA ≤ 70°C.

Test conditions: V

CC = 12V, T = 25°C.

Use Application Circuit.)

Reference & DAC Section (See Table 1 - Next Page)

Parameter

Symbol

Test Conditions

Regulation Accuracy (See Table 1)

(Less 40mV output adaptive positioning)

, V

CC = 12V, ILOAD = 6A

Regulation Accuracy

1.8V

≤ V

OUT

≤ 2.8V

Timing Section

Off Time Initial

OT

V

CC_CORE = 1.3V, CT = 390pF

V

CC_CORE = 3.5V, CT = 390pF

Off Time Temp Stability

V

CC_CORE = 1.3V to 3.5V

Discharging Current

I

DIS

V

CC_CORE = 1.3V, VCT = 1.5V

Ramp Peak

V

P

Ramp Peak-Valley

V

RPP

V

CC_CORE = 1.3V

V

CC_CORE = 3.5V

Ramp Valley Delay to Output

10% Overdrive

Input Bias Current (V

CC_CORE Pin)

I

B

1.3V < V

INV = VCC_CORE < 3.5V

Pulse By Pulse C

L

LX1662/1663

V

CLP

Initial Accuracy

LX1662A/1663A

Initial Accuracy

C

S Delay to Output

10% Overdrive

Error Comparator Section

Input Bias Current

I

B

1.3V < V

SS = VINV < 3.5V

Input Offset Voltage

V

IO

E

C Delay to Output

10% Overdrive

Output Drivers Section

Drive Rise Time

T

R

V

C1 = VCC = 12V, CL = 3000pF

Drive Fall Time

T

F

V

C1 = VCC = 12V, CL = 3000pF

Drive High

V

DH

V

CC = VCC = 12V, ISOURCE = 20mA

V

CC = VCC = 12V, ISINK = 200mA

Drive Low

V

DL

V

CC = VCC = 12V, ISOURCE = 20mA

V

CC = VCC = 12V, ISINK = 200mA

Output Pull Down

V

PD

V

CC = VC = 0, IPULL UP = 2mA

UVLO and S.S. Section

Start-Up Threshold

V

ST

Hysteresis

V

HYST

SS Sink Current

I

SD

V

C1 = 10.1V

SS Sat Voltage

V

OL

V

C1 = 9V, ISD = 200µA

Supply Current Section

Dynamic Operating Current

I

CD

V

CC = VC1 = 12V, Out Freq = 200kHz, CL = 0

Power Good / Over-Voltage Protection Section (LX1663 Only)

Lower Threshold

(V

CC_CORE / DACOUT)

Hysteresis

Power Good Voltage Low

I

PWRGD = 5mA

Over-Voltage Threshold

(V

CC_CORE / VDAC)

OVP Sourcing Current

V

OV = 5V

Units

-30

30

mV

-1

1

%

LX1662/1663 (A)

Min.

Typ.

Max.

2µs

1µs

40

ppm

180

210

240

µA

2V

0.9

1

1.1

V

0.37

0.42

0.47

V

100

ns

0.8

2

µA

36

41

46

mV

200

ns

27

35

µA

85

100

115

mV

50

60

70

mV

200

ns

70

ns

70

ns

11

V

10

V

0.06

0.1

V

0.8

1.2

V

0.8

1.4

V

9.9

10.1

10.4

V

0.31

V

2

5.5

mA

0.15

0.6

V

27

mA

88

90

92

%

1%

0.5

0.7

V

110

117

125

%

30

45

mA

Current Sense Section

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