MC34271

http://onsemi.com

3

the operating ambient temperature range that applies, unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

REFERENCE SECTION

Reference Voltage (TJ = 25°C)

Vref

1.225

1.250

1.275

V

Line Regulation (VDD = 5.0 V to 12.5 V)

Regline

–

2.0

10

mV

Load Regulation (IO = 0 to 120 µA)

Regload

–

2.0

10

mV

Total Variation (Line, Load and Temperature)

Vref

1.215

–

1.285

V

ERROR AMPLIFIERS

Input Offset Voltage (VCM = 1.25 V)

VIO

–

1.0

10

mV

Input Bias Current (VCM = 1.25 V)

IIB

–

120

600

nA

Open Loop Voltage Gain (VCM = 1.25 V, VCOMP = 2.0 V)

AVOL

80

100

–

dB

Output Voltage Swing

V

High State (IOH = –100 µA)

VeOH

VA–1.5

4.0

5.5

Low State (IOL = 100 µA)

VeOL

0

–

1.0

BIAS VOLTAGE

Voltage (VDD = 5.0 V to 12.5 V, IO = 0)

VA

4.6

5.0

5.4

V

OSCILLATOR AND PWM SECTIONS

Total Frequency Variation Over Line and Temperature

fOSC

kHz

VDD = 5.0 V to 10 V, TA = 0° to 70°C, RT = 169 k

90

115

140

Duty Cycle at Each Output

%

Maximum

DCmax

92

95

–

Minimum

DCmin

–

–

0

Sync Inpu

t

Input Resistance (Vsync = 3.5 V)

Rsync

25

50

100

k

Ω

Minimum Sync Pulse Width

Tp

–

1.0

–

µs

OUTPUT MOSFETs

Output Voltage – “On”–State (Isink = 200 mA)

VOL

–

150

250

mV

Output Current – “Off”–State (VOH = 40 V)

IOH

–

0.1

1.0

µA

Rise and Fall Times

tr, tf

–

50

–

ns

EL DISCHARGE OUTPUT (ELD) AND DRV1

Output Voltage – “On”–State (Isink = 100 µA)

VOL

–

30

100

mV

Output Voltage – “On”–State (Isink = 50 mA)

VOL

–

2.0

2.5

V

Output Voltage – “Off”–State (Isource = –100 µA)

VOH

VDD–0.5

5.9

–

V

Output Voltage – “Off”–State (Isource = – 50 mA)

VOH

VDD–3.5

3.3

–

V

FEEDBACK ENABLE SWITCHES (DS1, DS2)

Output Voltage – “Low”–State (Isink = 1.0 mA)

VfeOL

–

10

100

mV

Output Current – “Off”–State (VOH = 12.5 V)

IfeOH

–

0.6

1.0

µA

SWITCHED VDD OUTPUT (SW1)

Output Voltage

V

Switch “On” (EN1 = 1, Isource = 100 µA)

VswOH

5.5

5.9

6.0

Switch “Off” (EN1 = 0, Isink = 100 µA)

VswOL

0

0.1

0.2

AUXILIARY VOLTAGE OUTPUTS

V0 Enable Switch

“On”–Resistance: VB to V0

Rds

0

2.0

10

Ω

“Off”–State Leakage Current (VB = 10 V)

Ilkg

0

0.1

2.0

µA

V0 Voltage (VB = 30 V, Isource = 0 mA)

V0

29.5

29.9

30

V

V0 Resistance (Isource = 4.0 mA)

R0

20

40

60

Ω

NOTE: 1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.