RT34063APN datasheet(9/13 Pages) RICHTEK

9 / 13 page

RT34063A

DS34063A-13

March 2007

www.richtek.com

Absolute Maximum Ratings

Power Supply Voltage ------------------------------------------------------------------------------------------------ 30V

Feedback Input Voltage Range -------------------------------------------------------------------------------------

−0.3 to +30V

Switch Collector Voltage --------------------------------------------------------------------------------------------- 30V

Switch Emitter Voltage ----------------------------------------------------------------------------------------------- 30V

Switch Collector to Emitter Voltage ------------------------------------------------------------------------------- 30V

Driver Collector Voltage ---------------------------------------------------------------------------------------------- 30V

Driver Collector Current (see Note) -------------------------------------------------------------------------------- 100mA

Switch Current --------------------------------------------------------------------------------------------------------- 1.5A

Power Dissipation, PD @ TA = 25

°C

DIP-8 --------------------------------------------------------------------------------------------------------------------- 1.25W

SOP-8 -------------------------------------------------------------------------------------------------------------------- 0.625W

Package Thermal Resistance

DIP-8,

θJA --------------------------------------------------------------------------------------------------------------- 100°C/W

SOP-8,

θJA -------------------------------------------------------------------------------------------------------------- 160°C/W

Operating Junction Temperature ----------------------------------------------------------------------------------- +125

°C

Storage Temperature Range ---------------------------------------------------------------------------------------- 65 to +150

°C

Note:Maximum package power dissipation limits must be observed.

Electrical Characteristics

(VCC = 5V, TA = 25° C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max Units

Oscillator

Frequency

VPIN5 = 0V, CT = 1.0nF

kHz

Charge Current

ICHG

5.0V

≤ VCC ≤ 30V

μA

Discharge Current

IDISCHG 5.0V ≤ VCC ≤ 30V

160

250

290

μA

Discharge to Charge Current Ratio

Pin 7 to VCC

5.5

6.9

7.9

Current Limit Sense Voltage

VLIMIT

ICHG = IDISCHG

280

330

380

Output Switch

Saturation Voltage, Darlington Connection

ISW = 1.0A, Pins1, 8 connected

1.0

1.3

Saturation Voltage, Darlington Connection

ISW = 1.0A, RPIN8 = 82Ω to

VCC, Forced

β ≅ 20

0.45

0.7

DC Current Gain

ISW = 1.0A, VCE = 5.0V

Collector Off-state Current

VCE = 30V

0.01

100

μA

Comparator

Threshold Voltage

1.225 1.25 1.275

Threshold Voltage Line Regulation

3.0V

≤ VCC ≤ 30V

1.4

5.0

Input Bias Current

IBIAS

VIN = 0V

-20

-400

Total Device

Supply Current

ICC

VCC = 5.0V to 30V, CT = 1.0nF,

Pin7 = VCC, VPIN5 > VTH, Pin2

= GND, Remaining pins open

3.0

4.5

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