IP35063

IP33063

IP34063

Prelim. 2/95

Parameter

Test Conditions

Min.

Typ.

Max.

Units

20

35

50

150

200

250

0.5

6.0

250

300

350

1

1.3

0.45

0.7

35

120

10

1.18

1.25

1.32

0.04

0.2

40

400

2.4

3.5

Charging Current

Discharge Current

Voltage Swing

Discharge to Charge Current Ratio

Current Limit Sense Voltage

Saturation Voltage, Darlington Connection *

Saturation Voltage *

DC Current Gain

Collector Off–State Current

Threshold Voltage *

Threshold Voltage Line Regulation *

Input Bias Current *

Supply Current *

Pin 2 = Gnd , Remaining Pins Open.

µA

µA

Vpp

—

mV

V

V

—

nA

V

mV/V

nA

mA

OUTPUT SWITCH

COMPARATOR

TOTAL DEVICE

OSCILLATOR

NOTES

* Applies over full operating temperature range (see order information).

1.25 V

REFERENCE

REGULATOR

COMPARATOR

OSCILLATOR

S

R

Q

8

7

6

5

1

2

3

4

Q1

Q2

170

Ω

Switch

Collector

Switch

Emitter

Timing

Capacitor

Gnd

Driver

Collector

I

Sense

pk

V CC

Comparator

Inverting

Input

DESCRIPTION

The IP34063 series of control circuits contains all the

functions required to implement DC–DC converters.

Included are internal voltage reference, comparator,

controlled duty cycle oscillator with current limit circuit,

driver, and high current output switch. This series was

specifically designed to be incorporated in Step-Down

(Buck) and Step-Up (Boost) applications with a minimum

number of external components.