SC251EVB SEMTECH [Semtech Corporation], SC251EVB Datasheet - Page 2

• Manufacturer Part Number: SC251EVB
• Description: Step-down DC-DC Converter with Bias LDO for WCDMA Amplifi ers
• Manufacturer: SEMTECH [Semtech Corporation]

Exceeding the specifi cations below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specifed in the
Electrical Characteristics section is not recommended.
Notes:
1.
2.
Unless otherwise noted: V
Absolute Maximum Ratings
Electrical Characteristics
POWER MANAGEMENT
© 2006 Semtech Corp.
Parameter
Input Supply Voltage
Logic Inputs/Outputs
(EN, VMODE, VDAC, GD)
Output Voltage
LX Voltage
Thermal Impedance Junction to Ambient
VOUT Short-Circuit to GND
Operating Ambient Temperature Range
Storage Temperature
Maximum Junction Temperature
Peak IR Refl ow Temperature
ESD Protection Level
Parameter
Input Voltage Range
V
Line Regulation
Load Regulation (PWM)
Peak Inductor Current
Bypass FET current limit
Quiescent Current
OUT
Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under exposed pad pre JESD51 standards.
Tested according JEDEC standard JESD22-A114-B
Accuracy
IN
(2)
= 4V, EN = V
IN
, V
MODE
V
Symbol
V
OUT LOAD
I
OUT LINE
I
V
V
Q NORM
= GND (High Power), V
I
Q PASS
I
(1)
LX PK
PASS
IN
OUT
V
I
OUT
DAC
I
OUT
= 0A to 800mA, T
= 0.3V, V
V
= 200mA, T
DAC
MODE
Symbol
= 1.1V, T
T
V
V
V
V
V
θ
V
t
T
T
T
LEAD
IN
I
OUT
SC
ESD
JA
Conditions
= V
OUT
LX
IN
A
N
S
J
V
= 2.7V to 5V,
MODE
DAC
2
IN
= 200mA
A
, I
= -40 to 85°C. Typical values are at T
= 1.3V
= V
A
OUT
= -40 to 85°C
A
IN
= 60mA
= -40 to 85°C
, I
OUT
= 20mA
-0.3 to V
-0.3 to V
-1 to V
Continuous
-60 to +160
-40 to +150
Maximum
-40 to +85
Min
0.44
3.16
1.38
-0.3 to 7
2.7
IN
IN
IN
1
1
260
+0.3 ,7V Max
+0.3 ,7V Max
+1, 7V Max
49
2
A
= +25°C.
±1.2
±0.5
Typ
0.48
3.40
1.62
2.5
1.5
Max
www.semtech.com
0.52
3.64
1.86
1.7
2.5
5
SC251
Units
°C/W
°C
°C
°C
°C
kV
V
V
V
V
Units
s
mA
%
%
V
V
A
A