RT34063A
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, P
D
@ T
A
= 25°C
DIP-8 --------------------------------------------------------------------------------------------------------------------- 1.25W
SOP-8 -------------------------------------------------------------------------------------------------------------------- 0.625W
Package Thermal Resistance
DIP-8,
θ
JA
--------------------------------------------------------------------------------------------------------------- 100°C/W
SOP-8,
θ
JA
-------------------------------------------------------------------------------------------------------------- 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, T
A
= 25°C, unless otherwise specified)
Parameter
Oscillator
Frequency
Charge Current
Discharge Current
Discharge to Charge Current Ratio
Current Limit Sense Voltage
Output Switch
Saturation Voltage, Darlington Connection
Saturation Voltage, Darlington Connection
DC Current Gain
Collector Off-state Current
Comparator
Threshold Voltage
Threshold Voltage Line Regulation
Input Bias Current
Total Device
Supply Current
Symbol
Test Conditions
Min
Typ
Max Units
V
PIN5
= 0V, C
T
= 1.0nF
I
CHG
5.0V
≤
VCC
≤
30V
Pin 7 to VCC
V
LIMIT
I
CHG
= I
DISCHG
I
SW
= 1.0A, Pins1, 8 connected
I
SW
= 1.0A, R
PIN8
= 82Ω to
VCC, Forced
β ≅
20
I
SW
= 1.0A, V
CE
= 5.0V
V
CE
= 30V
I
DISCHG
5.0V
≤
VCC
≤
30V
26
25
160
5.5
280
--
--
50
--
38
36
250
6.9
330
1.0
0.45
75
0.01
48
43
290
7.9
380
1.3
0.7
--
100
kHz
μA
μA
--
mV
V
V
--
μA
V
mV
nA
1.225 1.25 1.275
3.0V
≤
VCC
≤
30V
I
BIAS
V
IN
= 0V
VCC = 5.0V to 30V, C
T
= 1.0nF,
Pin7 = VCC, V
PIN5
>
V
TH
, Pin2
= GND, Remaining pins open
--
--
1.4
-20
5.0
-400
I
CC
--
3.0
4.5
mA
DS34063A-13 March 2007
www.richtek.com
9
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
