RT34063A
Absolute Maximum Ratings
z Power Supply Voltage ------------------------------------------------------------------------------------------------ 30V
z Feedback Input Voltage Range ------------------------------------------------------------------------------------- −0.3 to +30V
z Switch Collector Voltage --------------------------------------------------------------------------------------------- 30V
z Switch Emitter Voltage ----------------------------------------------------------------------------------------------- 30V
z Switch Collector to Emitter Voltage ------------------------------------------------------------------------------- 30V
z Driver Collector Voltage ---------------------------------------------------------------------------------------------- 30V
z Driver Collector Current (see Note) -------------------------------------------------------------------------------- 100mA
z Switch Current --------------------------------------------------------------------------------------------------------- 1.5A
z Power Dissipation, PD @ TA = 25°C
DIP-8 --------------------------------------------------------------------------------------------------------------------- 1.25W
SOP-8 -------------------------------------------------------------------------------------------------------------------- 0.625W
z Package Thermal Resistance
DIP-8, θJA --------------------------------------------------------------------------------------------------------------- 100°C/W
SOP-8, θJA -------------------------------------------------------------------------------------------------------------- 160°C/W
z Operating Junction Temperature ----------------------------------------------------------------------------------- +125°C
z 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
Charge Current
Discharge Current
Discharge to Charge Current Ratio
VPIN5 = 0V, CT = 1.0nF
ICHG 5.0V ≤ VCC ≤ 30V
IDISCHG 5.0V ≤ VCC ≤ 30V
Pin 7 to VCC
26 38 48 kHz
25 36 43 μA
160 250 290 μA
5.5 6.9 7.9 --
Current Limit Sense Voltage
Output Switch
VLIMIT ICHG = IDISCHG
280 330 380 mV
Saturation Voltage, Darlington Connection
ISW = 1.0A, Pins1, 8 connected -- 1.0 1.3 V
Saturation Voltage, Darlington Connection
ISW = 1.0A, RPIN8 = 82Ω to
VCC, Forced β ≅ 20
-- 0.45 0.7 V
DC Current Gain
Collector Off-state Current
Comparator
ISW = 1.0A, VCE = 5.0V
VCE = 30V
50 75 -- --
-- 0.01 100 μA
Threshold Voltage
1.225 1.25 1.275 V
Threshold Voltage Line Regulation
3.0V ≤ VCC ≤ 30V
-- 1.4 5.0 mV
Input Bias Current
Total Device
IBIAS VIN = 0V
-- -20 -400 nA
Supply Current
VCC = 5.0V to 30V, CT = 1.0nF,
ICC
Pin7 = VCC, VPIN5 > VTH, Pin2 -- 3.0 4.5 mA
= GND, Remaining pins open
DS34063A-13 March 2007
www.richtek.com
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