MIC23250 Datasheet, PDF (3/15 Pages) Micrel Semiconductor – 4MHz Dual 400mA Synchronous Buck Regulator with HYPER LIGHT LOAD™

Micrel, Inc.
MIC23250
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .........................................................6V
Output Switch Voltage (V_SW) ............................................6V
Logic Input Voltage (V_EN) .................................. –0.3V to V_IN
Storage Temperature Range (T_s)..............–65°C to +150°C
ESD Rating⁽³⁾.................................................................. 2kV
Operating Ratings⁽²⁾
Supply Voltage (V_IN)......................................... 2.7V to 5.5V
Logic Input Voltage (V_EN) .................................. –0.3V to V_IN
Junction Temperature (T_J) ..................–40°C ≤ T_J ≤ +125°C
Thermal Resistance
2mm x 2mm Thin MLF^®-10 (θ_JA)........................70°C/W
Electrical Characteristics⁽⁴⁾
T_A = 25°C with V_IN = V_EN = 3.6V; L = 1µH; C_OUT = 4.7µF; I_OUT = 20mA; only one channel power is enabled, unless
otherwise specified. Bold values indicate –40°C< T_J < +125°C.
Parameter
Condition
Min Typ Max
Supply Voltage Range
2.7
5.5
Under-Voltage Lockout Threshold (turn-on)
2.45 2.55 2.65
UVLO Hysteresis
60
Quiescent Current,
Hyper LL mode
V_{OUT1, 2 (both Enabled)}, I_{OUT1, 2} = 0mA , SNS1, 2 >1.2 * V_{OUT1, 2}
Nominal
35
50
Shutdown Current
Output Voltage Accuracy
Current Limit in PWM Mode
Output Voltage Line Regulation
Output Voltage Load Regulation
Maximum Duty Cycle
PWM Switch ON-Resistance
Frequency
Soft Start Time
Enable Threshold
V_{EN1, 2} = 0V; V_IN = 5.5V
V_IN = 3.6V, I_LOAD = 20mA
SNS = 0.9*V_{OUT NOM}
V_IN = 3.0V to 5.5V, I_LOAD = 20mA
20mA < I_LOAD < 400mA, V_IN = 3.6V
SNS ≤ V_NOM, V_OUT = 1.8V, V_IN = 2.7V
I_SW = 100mA PMOS
I_SW = -100mA NMOS
I_LOAD = 120mA
V_OUT = 90%
0.01
4
–2.5
+2.5
0.410 0.65
1
0.4
0.5
80
86
0.6
0.8
3.4
4
4.6
260
0.5
0.8
1.2
Enable Input Current
0.1
2
Over-temperature Shutdown
160
Over-temperature Shutdown
Hysteresis
40
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.
Units
V
V
mV
µA
µA
%
A
%/V
%
%
Ω
Ω
MHz
µs
V
µA
°C
°C
December 2007
3
M9999-121707-A