MIC33050 Datasheet, PDF (3/13 Pages) Micrel Semiconductor – 4MHz Internal Inductor PWM Buck Regulator with HyperLight Load™

Micrel, Inc.
MIC33050
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .........................................................6V
Output Switch Voltage (V_SW) ............................................6V
Output Switch Current (I_SW)..............................................2A
Logic Input Voltage (V_EN) .................................. –0.3V to V_IN
Storage Temperature Range (T_s)..............–65°C to +150°C
ESD Rating⁽³⁾.................................................................. 3kV
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
3mm x 3mm MLF^®-12 (θ_JA)................................60°C/W
Electrical Characteristics⁽⁴⁾
T_A = 25°C with V_IN = V_EN = 3.6V; C_FF = 560pF; C_OUT = 4.7µF; I_OUT = 20mA unless otherwise specified.
Bold values indicate –40°C< T_J < +125°C.
Parameter
Condition
Min Typ
Supply Voltage Range
2.7
Under-Voltage Lockout Threshold (turn-on)
2.45 2.55
UVLO Hysteresis
100
Quiescent Current,
Hyper LL mode
I_OUT = 0mA , V_SNS > 1.2*V_OUT nominal
20
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_IN = 5.5V; V_EN = 0V;
V_IN = 3.0V, I_LOAD = 20mA
SNS = 0.9*V_NOM
V_IN = 3.0V to 5.5V, I_LOAD = 20mA
20mA < I_LOAD < 500mA,
SNS ≤ V_NOM
I_SW = 100mA PMOS
I_SW = -100mA NMOS
I_LOAD = 120mA
V_OUT = 90%
(turn-on)
0.01
–2.5
0.65
1
0.5
0.3
80
89
0.45
0.5
3.4
4
650
0.5
0.8
Enable Hysteresis
35
Enable Input Current
0.1
Over-temperature Shutdown
165
Over-temperature Shutdown
Hysteresis
20
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.
Max
5.5
2.65
32
4
+2.5
1.7
4.6
1.2
2
Units
V
V
mV
µA
µA
%
A
%/V
%
%
Ω
Ω
MHz
µs
V
mV
µA
°C
°C
October 2007
3
M9999-100407-A