SE9135 Datasheet, PDF (2/4 Pages) Seaward Electronics Inc. – 350mA Advanced Current Regulator

Absolute Maximum Rating ⁽¹⁾
Parameter
Symbol
Input Voltage
Output Voltage
Output Sink Current
Thermal Resistance, Junction-to-Ambien（t SOT89）
V_DD
V_OUT
I_OUT
Θ_JA
Lead Temperature (Soldering, 5 sec.)
Junction Temperature
T_J
Storage Temperature
T_S
Value
-0.3～7V
-0.3 to 4.6
400
180
260
0 to +150
-40 to +150
Units
V
V
mA
°C/W
°C
°C
°C
Electrical Characteristics
V_DD = 3.7V; No Load; T_J = 25°C; unless otherwise noted
Symbol
Parameter
Conditions
Output Sink Current
I_SINK
V_OUT=0.2V
Load Regulation
V_OUT=0.2V to 3V
Min Typ Max Unit
315 350 390 mA
22
mA/V
Line Regulation
V_DD=3V to 6V ，V_OUT=0.2V
1.88
mA/V
Output Dropout Voltage ⁽²⁾
V_OUTL
150
mV
Supply Current Consumption
I_DD
212
μA
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: Output dropout voltage: 90% x I @ V =200mV
OUT
OUT
Thermal Considerations
It is important that the thermal limit of the package is not exceeded. The SE9135 has built-in thermal
protection. When the thermal limit is exceeded, the IC will enter protection, and V_OUT will be pulled to ground.
The power dissipation for a given application can be calculated as following:
The power dissipation (P_D) is
P_D = I_OUT * [V_IN – V_OUT]
The thermal limit of the package is then limited to P_D(MAX) = [T_J – T_A]/Θ_JA where T_J is the junction temperature,
TA is the ambient temperature, and Θ_JA is around 180°C/W for SE9135. SE9135 is designed to enter thermal
protection at 150°C. For example, if T_A is 25°C then the maximum P_D is limited to about 0.7W. In other
words, if I_OUT(MAX) = 350mA, then [V_IN – V_OUT] cannot exceed 2V.
Revision 7/27/2007
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 2