MC34262 MC33262

3

MOTOROLA ANALOG IC DEVICE DATA

temperature range that applies (Note 3), unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

CURRENT SENSE COMPARATOR

Input Bias Current (VPin 4 = 0 V)

IIB

—

– 0.15

–1.0

µA

Input Offset Voltage (VPin 2 = 1.1 V, VPin 3 = 0 V)

VIO

—

9.0

25

mV

Maximum Current Sense Input Threshold (Note 5)

Vth(max)

1.3

1.5

1.8

V

Delay to Output

tPHL(in/out)

—

200

400

ns

DRIVE OUTPUT

Output Voltage (VCC = 12 V)

Low State

(ISink = 20 mA)

Low State

(ISink = 200 mA)

High State

(ISource = 20 mA)

High State

(ISource = 200 mA)

VOL

VOH

—

—

9.8

7.8

0.3

2.4

10.3

8.4

0.8

3.3

—

—

V

Output Voltage (VCC = 30 V)

High State (ISource = 20 mA, CL = 15 pF)

VO(max)

14

16

18

V

Output Voltage Rise Time (CL = 1.0 nF)

tr

—

50

120

ns

Output Voltage Fall Time (CL = 1.0 nF)

tf

—

50

120

ns

Output Voltage with UVLO Activated

(VCC = 7.0 V, ISink = 1.0 mA)

VO(UVLO)

—

0.1

0.5

V

RESTART TIMER

Restart Time Delay

tDLY

200

620

—

µs

UNDERVOLTAGE LOCKOUT

Startup Threshold (VCC Increasing)

Vth(on)

11.5

13

14.5

V

Minimum Operating Voltage After Turn–On (VCC Decreasing)

VShutdown

7.0

8.0

9.0

V

Hysteresis

VH

3.8

5.0

6.2

V

TOTAL DEVICE

Power Supply Current

Startup (VCC = 7.0 V)

Operating

Dynamic Operating (50 kHz, CL = 1.0 nF)

ICC

—

—

—

0.25

6.5

9.0

0.4

12

20

mA

Power Supply Zener Voltage (ICC = 25 mA)

VZ

30

36

—

V

NOTES: 1. Maximum package power dissipation limits must be observed.

2. Adjust VCC above the startup threshold before setting to 12 V.

Pin 4 Threshold

VPin 3 (VPin 2 – Vth(M))

4. K =

3. Tlow =0°C for MC34262

Thigh =+ 85°C for MC34262

5. This parameter is measured with VFB = 0 V, and VPin 3 = 3.0 V.

1.4

– 0.2

3.8

0.6

2.2

3.0

VPin 2 = 2.0 V

VCC = 12 V

TA = 25°C

VM, MULTIPLIER PIN 3 INPUT VOLTAGE (V)

Figure 1. Current Sense Input Threshold

versus Multiplier Input

– 0.12

VM, MULTIPLIER PIN 3 INPUT VOLTAGE (V)

– 0.06

0.06

0.12

0.18

0.24

0

VCC = 12 V

TA = 25°C

Figure 2. Current Sense Input Threshold

versus Multiplier Input, Expanded View

0.2

0

1.6

0.08

1.4

1.2

1.0

0.8

0.6

0.4

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0

VPin 2 = 3.75 V

VPin 2 = 2.25 V

VPin 2 = 2.5 V

VPin 2 = 2.75 V

VPin 2 = 3.0 V

VPin 2 = 2.25 V

VPin 2 = 2.5 V

VPin 2 = 3.75 V

VPin 2 = 2.75 V

VPin 2 = 2.0 V

VPin 2 = 3.25 V

VPin 2 = 3.0 V

VPin 2 = 3.25 V

VPin 2 = 3.5 V

VPin 2 = 3.5 V