MIC4950 Datasheet, PDF (3/18 Pages) Micrel Semiconductor – Hyper Speed Control 5A Buck Regulator

Micrel, Inc.
MIC4950
Absolute Maximum Ratings⁽³⁾
PVIN, AVIN Supply Voltage (V_IN) ...................... –0.3V to 6V
SW Output Switch Voltage (V_SW) ...................... –0.3V to V_IN
EN, PG (V_EN, V_PG) ............................................. –0.3V to V_IN
FB Feedback Input Voltage (V_FB)...................... –0.3V to V_IN
Storage Temperature Range .................... –65°C to +150°C
ESD Rating⁽⁵⁾........................................................ 2kV, HBM
Operating Ratings⁽⁴⁾
Supply Voltage (V_IN) ......................................... 2.7V to 5.5V
Enable Input Voltage (V_EN)....................................0V to VIN
Junction Temperature Range (T_J).......–40°C ≤ T_J ≤ +125°C
Thermal Resistance
SOIC-8 (_JA).....................................................120°C/W
DFN-10 (_JA) ...................................................... 35°C/W
Electrical Characteristics⁽⁶⁾
VIN = VEN = 3.3V; L = 1.0µH; CIN = 10µF; COUT = 10µF; TA = 25°C, bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Symbol
Parameter
Condition
Min. Typ. Max.
VIN
VUVLO
Supply Voltage Range
Under-Voltage Lockout
Threshold
Turn-On
2.7
5.5
2.41
2.5 2.61
VUVLOH
Under-Voltage Lockout
Hysteresis
400
IQ
ISD
VFB
ILIMIT
LINEREG
Quiescent Current
Shutdown Current
Feedback Voltage
Current Limit
Output Voltage Line
Regulation
IOUT = 0mA , FB > 1.2*VFB (Nominal)
VEN = 0V
FB = 0.9*VFB (Nominal)
VIN = 2.7 to 3.5V, VOUTNOM = 1.8V, ILOAD = 20mA
VIN = 4.5V to 5.5V if VOUTNOM ≥ 2.5V, ILOAD =
20mA
0.609
5.5
0.8
2
0.01 2
0.625 0.64
7.5 10
1
20mA < ILOAD < 500mA,
VIN = 3.6V if VOUTNOM < 2.5V
0.3
LOADREG
Output Voltage Load
Regulation
20mA < ILOAD < 500mA,
VIN = 5.0V if VOUTNOM ≥ 2.5V
20mA < ILOAD < 5A, VIN = 3.6V if VOUTNOM < 2.5V
1
20mA < ILOAD < 5A, VIN = 5.0V if VOUTNOM ≥ 2.5V
RDSON-P
ISW = 1A P-Channel MOSFET
30
PWM Switch ON-Resistance
RDSON-N
ISW = –1A N-Channel MOSFET
25
VIN = 4.5V, VFB = 0.5V
665
tON
Maximum Turn-On Time
VIN = 3.0V, VFB = 0.5V
1000
VIN = 2.7V, VFB = 0.5V
1120
tOFF
Minimum Turn-Off Time
VIN = 3.0V, VFB = 0.5V
176
tSOFT-ON
Soft Start Time
VOUT = 90% of VOUTNOM
500
VEN
Enable Threshold
Turn-On
0.5
0.8 1.2
Notes:
3. Exceeding the absolute maximum ratings may damage the device.
4. The device is not guaranteed to function outside its operating ratings.
5. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
6. Specification for packaged product only.
Units
V
V
mV
mA
µA
V
A
%/V
%
%
Ω
ns
ns
µs
V
March 20, 2014
3
Revision 1.1