MIC22950 Datasheet, PDF (3/22 Pages) Micrel Semiconductor – 10A Integrated Switch Synchronous Buck Regulator with Frequency Programmable to 2MHz

Micrel, Inc.
MIC22950
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (PVIN, SVIN).............................. −0.3V to +6V
Output Switch Voltage (V_SW) ........................... −0.3V to +6V
Output Switch Current (I_SW) ......................Internally Limited
Logic Input Voltage (V_EN, V_POR, V_DLY)................. –0.3V to V_IN
Control Voltage (CF, RC, COMP, FB) .................... –0.3V to V_IN
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (Ts).........................–65°C to +150°C
Operating Ratings⁽²⁾
Supply Voltage (V_IN)......................................... 2.6V to 5.5V
Junction Temperature (T_J) ..................–40°C ≤ T_J ≤ +125°C
Thermal Resistance
MLF^® (θ_JC)..........................................................11°C/W
MLF^® (θ_JA)..........................................................30°C/W
Electrical Characteristics⁽³⁾
T_A = 25°C with V_IN = V_EN = 3.3V; V_OUT = 1.8V, unless otherwise specified. Bold values indicate –40°C ≤ T_J ≤ +125°C.
Parameter
Condition
Min. Typ. Max. Units
Supply Voltage Range
2.6
5.5
V
V_IN Turn On Voltage Threshold
UVLO Hysteresis
(V_IN Rising)
2.35 2.5
2.6
V
260
mV
Quiescent Current (PWM Mode)
Shutdown Current
[Adjustable] Feedback Voltage
V_EN = >1.34V; V_FB = 1.1*V_NOM (not switching)
V_EN = 0V
± 2% (over temperature)
1
2
mA
5
10
µA
0.686
0.714
V
FB pin input current
1
nA
Current Limit
Output Voltage Line Regulation
Output Voltage Load Regulation
Maximum Duty Cycle
Switch ON-Resistance PFET
Switch ON-Resistance NFET
Oscillator Frequency
V_FB = 0.9*V_NOM
V_OUT 1.8V; V_IN = 2.6 to 5.5V, I_LOAD = 100mA
100mA < I_LOAD < 10A, Vin = 3.3V
V_FB ≤ 0.5V
I_SW = 1000mA V_FB=0.5V
I_SW = -1000mA V_FB=0.9V
CF = 390pF
10
16.5
21
A
0.2
%
0.2
%
100
%
11
mΩ
8
mΩ
325
510
610
kHz
EN/DLY threshold voltage
1.14 1.24 1.34
V
EN/DLY source current
RC Pin I_RAMP
Power On Reset I_PG(LEAK)
V_IN = 2.6 to V_IN = 5.5V
Ramp Control Current
V_PORH = 5.5V; POR = High
0.6
1
1.8
µA
0.6
1
1.8
µA
1
µA
2
µA
Power On Reset V_PG(LO)
Output Logic-Low Voltage (undervoltage condition),
77
mV
I_POR = 5mA
Hysteresis
2
%
Power On Reset V_PG
Threshold, % of V_OUT below nominal
7.5
10
12.5
%
Over-temperature Shutdown
160
°C
Over-temperature Shutdown Hysteresis
20
°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.
February 2010
3
M9999-021910-B