TS34063

Dc to Dc Converter Controller

2/10

Version: B13

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Oscillator (OSC)

Frequency

24

33

42

KHz

Charge Current

24

30

42

uA

Discharge Current

140

200

260

uA

Discharge to Charge current ratio

5.2

6.5

7.5

--

Current Limit Sense Voltage

250

--

350

mV

Output switch (note1)

Saturation Voltage

--

1.0

1.3

V

Saturation Voltage

--

0.45

0.7

V

DC current gain

50

75

--

--

Collector off-state current

--

0.01

100

uA

Comparator

Threshold Voltage

1.225

1.25

1.275

V

Line regulation

--

--

6

mV

Total device

Supply Current

pin2=Gnd, remaining pins

open

--

3

5

mA

Notes1: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient

temperature as possible

Note 2: If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents

(<=300mA) and high driver currents (>=30mA), it may take up to 2uS for it to come out of saturation. This

condition will shorten the off time at frequencies >= 30KHz, and is magnified at high temperature. This

condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-

darlington configuration is used, the following output drive condition is recommended: Forced Bata of

output switch: Ic output / (Ic driver – 7mA*) >= 10

* The 100ohm resistor in the emitter of the driver divide requires about 7mA before the output switch

conducts.

Block Diagram