SC4626 Datasheet, PDF (3/21 Pages) Semtech Corporation – 2.5MHz, 1A Synchronous Step Down Regulator in SOT23-5

SC4626
Absolute Maximum Ratings
VIN Supply Voltage ……………………………… -0.3 to 6.0V
LX Voltage ………….. -1 to V_IN+1V, -3V (20ns Max), 6V Max
VOUT Voltage ……………………………… -0.3 to V_IN+0.3V
EN Voltage …………………………………. -0.3 to V_IN+0.3V
Peak IR Reflow temperature …………………………. 260°C
ESD Protection Level⁽²⁾ …………………………………. 3kV
Recommended Operating Conditions
VIN Supply Voltage ……………………………… 2.9 to 5.5V
Maximum Output Current …………………………… 1.0A
Temperature Range …………………………… -40 to +85˚C
Thermal Information
Thermal Resistance, Junction to Ambient⁽¹⁾ ………… 90°C/W
Maximum Junction Temperature …………………… +150°C
Storage Temperature Range ………………… -65 to +150 °C
Exceeding the absolute maximum ratings may result in permanent damage to the device and/or device malfunction. Operation outside of the
parameters specified in the Electrical Characteristics section is not recommended.
Notes:
(1) Measured in free convection, mounted on 10mm x 10mm, 2 layer FR4 PCB shown in figure 4 with copper of 1oz for each layer.
(2) Tested according to JEDEC standard JESD22-A114-B.
Electrical Characteristics
Unless specified: V_IN = 5.0V; -40°C<T_A<+85 °C; T_J(MAX)=125°C; Unless otherwise noted typical values are T_A=+25 °C.
Parameter
Symbol
Conditions
Min
Under-Voltage Lockout
Output Voltage Tolerance⁽¹⁾
Current Limit
VIN Supply Current
VIN Shutdown Current
High Side Switch Resistance
Low Side Switch Resistance
LX Leakage Current
Line Regulation
Load Regulation⁽²⁾
Oscillator Frequency
Soft-Start Time⁽²⁾
EN Input High Current
EN Input Low Current
EN Input High Threshold
EN Input Low Threshold
UVLO
ΔV_OUT
I_LIMIT
I_Q
I_SHDN
R_{DSON_P}
R_{DSON_N}
I_LK(LX)
ΔV_LINE-REG
ΔV_LOAD-REG
F_OSC
T_SS
I_{EN_HI}
I_{EN_LO}
V_{EN_HI}
V_{EN_LO}
Rising V_IN
2.60
Hysteresis
V_IN=3.6V to 5.0V; No Load
-2.5
Peak inductor current
1.5
EN= VIN, No Load
EN= GND
I_LX= 100mA
I_LX= -100mA
V_IN=5.5V; L_X=0V; EN=GND
V_IN=5.5V; L_X=5.0V; EN=GND
-10
V_IN= 3.6 – 5.0V; I_OUT=0A
V_IN= 5.0V; I_OUT=10mA – 1.0A
2.0
EN=VIN
-2.0
EN=GND
-2.0
1.2
© 2009 Semtech Corp.

Typ
2.70
250
7.5
1
0.15
0.125
1
-1
±1.0
±1.0
2.5
100
Max
2.80
+2.5
10
10
3.0
2.0
2.0
0.4
Units
V
mV
%
A
mA
µA
Ω
µA
%
%
MHz
µs
µA
µA
V
V
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