English
Language : 

MIC23250_10 Datasheet, PDF (4/20 Pages) Micrel Semiconductor – 4MHz Dual 400mA Synchronous Buck Regulator with HyperLight Load
◁
Micrel, Inc.
MIC23250
Absolute Maximum Ratings(1)
Supply Voltage (VIN) .........................................................6V
Output Switch Voltage (VSW) ............................................6V
Logic Input Voltage (VEN1, VEN2) ........................ –0.3V to VIN
Storage Temperature Range (Ts)..............–65°C to +150°C
ESD Rating(3).................................................................. 2kV
Operating Ratings(2)
Supply Voltage (VIN)......................................... 2.7V to 5.5V
Logic Input Voltage (VEN1, VEN2) ............................. 0V to VIN
Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C
Thermal Resistance
2mm x 2mm Thin MLF-10 (θJA) .........................70°C/W
2.5mm x 2.5mm Thin MLF-12 (θJA) ...................65°C/W
Electrical Characteristics(4)
TA = 25°C with VIN = VEN1 = VEN2 = 3.6V; L = 1µH; COUT = 4.7µF; IOUT = 20mA; only one channel power is enabled, unless
otherwise specified. Bold values indicate –40°C< TJ < +125°C.
Parameter
Condition
Min Typ Max Units
Under-Voltage Lockout Threshold (turn-on)
2.45 2.55 2.65
V
UVLO Hysteresis
60
mV
Quiescent Current
VOUT1, 2 (both Enabled), IOUT1, 2 = 0mA , VSNS1,2 >1.2 * VOUT1, 2
Nominal
33
50
µA
Shutdown Current
Output Voltage Accuracy
Feedback Voltage (Adj only)
VEN1, 2 = 0V; VIN = 5.5V
VIN = 3.6V if VOUTNOM < 2.5V, ILOAD = 20mA
VIN = 4.5V if VOUTNOM ≥ 2.5V, ILOAD = 20mA
0.01
4
µA
–2.5
+2.5
%
–2.5
+2.5
%
0.720
V
Current Limit in PWM Mode
Output Voltage Line Regulation
Output Voltage Load Regulation
PWM Switch ON-Resistance
Frequency
Soft Start Time
Enable Threshold
SNS = 0.9*VOUT NOM
VIN = 3.6V to 5.5V if VOUTNOM < 2.5V, ILOAD = 20mA
VIN = 4.5V to 5.5V if VOUTNOM ≥ 2.5V, ILOAD = 20mA
20mA < ILOAD < 400mA, VIN = 3.6V if VOUTNOM < 2.5V
20mA < ILOAD < 400mA, VIN = 5.0V if VOUTNOM ≥ 2.5V
ISW = 100mA PMOS
ISW = -100mA NMOS
ILOAD = 120mA
VOUT = 90%
0.410 0.65
1
A
0.4
%/V
0.4
%/V
0.5
%
0.5
%
0.6
Ω
0.8
Ω
4
MHz
260
µs
0.5
0.8
1.2
V
Enable Input Current
0.1
2
µA
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
160
°C
40
°C
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model: 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
June 2010
4
M9999-061110-E
 ▷