MIC4723 Datasheet, PDF (3/19 Pages) Micrel Semiconductor – 3A 2MHz Integrated Switch Buck Regulator

Micrel, Inc.
MIC4723
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .......................................................+6V
Output Switch Voltage (V_SW) ..........................................+6V
Output Switch Current (I_SW)............................................11A
Logic Input Voltage (V_EN) .................................. –0.3V to V_IN
Storage Temperature (T_s) .........................–60°C to +150°C
Operating Ratings⁽²⁾
Supply Voltage (V_IN)..................................... +2.7V to +5.5V
Logic Input Voltage (V_EN) ....................................... 0V to V_IN
Junction Temperature (T_J) ........................ –40°C to +125°C
Junction Thermal Resistance
3mm x 3mm MLF-12 (θ_JA) .................................60°C/W
3mm x 3mm MLF-12 (θ_Jc) .................................28°C/W
Electrical Characteristics⁽⁴⁾
V_IN = V_EN = 3.6V; L = 1µH; C_OUT = 4.7µF; T_A = 25°C, unless noted. Bold values indicate –40°C< T_J < +125°C.
Parameter
Condition
Min
Typ
Max Units
Supply Voltage Range
2.7
5.5
V
Under-Voltage Lockout
Threshold
(turn-on)
2.45 2.55 2.65
V
UVLO Hysteresis
100
mV
Quiescent Current
V_FB = 0.9 * V_NOM (not switching)
570
900
µA
Shutdown Current
[Adjustable] Feedback
Voltage
V_EN = 0V
± 2% (over temperature) I_LOAD = 100mA
2
10
µA
0.98
1.02
V
FB pin input current
1
nA
Current Limit in PWM Mode V_FB = 0.9 * V_NOM
3.5
5
A
Output Voltage Line
V_OUT > 2V; V_IN = V_OUT+500mV to 5.5V; I_LOAD= 100mA
0.07
%
Regulation
V_OUT < 2V; V_IN = 2.7V to 5.5V; I_LOAD= 100mA
%
Output Voltage Load
Regulation
20mA < I_LOAD < 3A
0.2
%
Maximum Duty Cycle
V_FB ≤ 0.4V
100
%
PWM Switch ON-
Resistance
I_SW = 50mA; V_FB = GND (High Side Switch)
95
200
mΩ
300
mΩ
Oscillator Frequency
1.8
2
2.2
MHz
Enable Threshold
0.5
0.85
1.3
V
Enable Hysteresis
50
mV
Enable Input Current
0.1
2.3
µA
Power Good Range
±7
±10
%
Power Good Resistance
I_PGOOD = 500µA
150
250
Ω
Over-Temperature
Shutdown
160
°C
Over-Temperature
Hysteresis
25
°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. Specification for packaged product only.
May 2007
3
M9999-052307-A