MC34167 MC33167

2

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Power Supply Input Voltage

VCC

40

V

Switch Output Voltage Range

VO(switch)

–2.0 to + Vin

V

Voltage Feedback and Compensation Input

Voltage Range

VFB, VComp

–1.0 to + 7.0

V

Power Dissipation

Case 314A, 314B and 314D (TA = +25°C)

PD

Internally Limited

W

Thermal Resistance, Junction–to–Ambient

θJA

65

°C/W

Thermal Resistance, Junction–to–Case

θJC

5.0

°C/W

Case 936A (D2PAK) (TA = +25°C)

PD

Internally Limited

W

Thermal Resistance, Junction–to–Ambient

θJA

70

°C/W

Thermal Resistance, Junction–to–Case

θJC

5.0

°C/W

Operating Junction Temperature

TJ

+150

°C

Operating Ambient Temperature (Note 3)

MC34167

MC33167

TA

0 to + 70

– 40 to + 85

°C

Storage Temperature Range

Tstg

– 65 to +150

°C

temperature range that applies [Notes 2, 3], unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

OSCILLATOR

Frequency (VCC = 7.5 V to 40 V)

TA = +25°C

TA = Tlow to Thigh

fOSC

65

62

72

–

79

81

kHz

ERROR AMPLIFIER

Voltage Feedback Input Threshold

TA =+ 25°C

TA = Tlow to Thigh

VFB(th)

4.95

4.85

5.05

–

5.15

5.20

V

Line Regulation (VCC = 7.5 V to 40 V, TA = +25°C)

Regline

–

0.03

0.078

%/V

Input Bias Current (VFB = VFB(th) + 0.15 V)

IIB

–

0.15

1.0

µA

Power Supply Rejection Ratio (VCC = 10 V to 20 V, f = 120 Hz)

PSRR

60

80

–

dB

Output Voltage Swing

High State (ISource = 75 µA, VFB = 4.5 V)

Low State (ISink = 0.4 mA, VFB = 5.5 V)

VOH

VOL

4.2

–

4.9

1.6

–

1.9

V

PWM COMPARATOR

Duty Cycle (VCC = 20 V)

Maximum (VFB = 0 V)

Minimum (VComp = 1.9 V)

DC(max)

DC(min)

92

0

95

0

100

0

%

SWITCH OUTPUT

Output Voltage Source Saturation (VCC = 7.5 V, ISource = 5.0 A)

Vsat

–

(VCC –1.5)

(VCC –1.8)

V

Off–State Leakage (VCC = 40 V, Pin 2 = Gnd)

Isw(off)

–

0

100

µA

Current Limit Threshold (VCC = 7.5 V)

Ipk(switch)

5.5

6.5

8.0

A

Switching Times (VCC = 40 V, Ipk = 5.0 A, L = 225 µH, TA = +25°C)

Output Voltage Rise Time

Output Voltage Fall Time

tr

tf

–

–

100

50

200

100

ns

UNDERVOLTAGE LOCKOUT

Startup Threshold (VCC Increasing, TA = +25°C)

Vth(UVLO)

5.5

5.9

6.3

V

Hysteresis (VCC Decreasing, TA = +25°C)

VH(UVLO)

0.6

0.9

1.2

V

TOTAL DEVICE

Power Supply Current (TA = +25°C )

Standby (VCC = 12 V, VComp < 0.15 V)

Operating (VCC = 40 V, Pin 1 = Gnd for maximum duty cycle)

ICC

–

–

36

40

100

60

µA

mA

NOTES: 1. Maximum package power dissipation limits must be observed to prevent thermal shutdown activation.

2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.

=– 40

°C for MC33167

= + 85

°C for MC33167