MIC2166_1009 Datasheet, PDF (5/28 Pages) Micrel Semiconductor – Adaptive On-Time DC-DC Controller Hyper Speed Control™ Family

Micrel, Inc.
MIC2166
Electrical Characteristics (Continued)
V_IN = V_EN= 12V; V_BST – V_SW = 5V; T_J = 25°C, unless noted. Bold values indicate −40°C ≤ T_J ≤ 125°C.
Parameter
Condition
Min
Typ
Max
Units
On Timer
Switching Frequency
Minimum Off-Time
Maximum Duty Cycle
Minimum Duty Cycle
Short Current Protection
Current-Limit Threshold
Short-Circuit Current
FET Drives
DH, DL Output Low Voltage
DH, DL Output High Voltage
DH On-Resistance
DL On-Resistance
SW, BST Leakage Current
450
600
200
300
Results from Switching Frequency and
Minimum Off-Time
82
V_FB = 1.0V
0
V_FB = 0.79V
V_FB = 0V
98
133
24
48
I_SINK = 10mA
I_SOURCE = 10mA
Pull Up, I_SOURCE = 20mA
Pull Down, I_SINK = 20mA
Pull Up, I_SOURCE = 20mA
Pull Down, I_SINK = 20mA
V_SW = V_BST = 0
V_DD − 0.1V
or
V_BST − 0.1V
2
1.5
2
1
750
kHz
400
ns
%
%
182
mV
72
mV
0.1
V
V
3
Ω
3
Ω
3
Ω
2
Ω
30
µA
Power Good (PGOOD)
PGOOD Threshold Voltage
PGOOD Hysteresis
PGOOD Delay Time
PGOOD Low Voltage
Sweep V_FB from Low-to-High
Sweep V_FB from High-to-Low
Sweep V_FB from Low-to-High
V_FB < 0.9 × V_NOM, I_PGOOD = 1mA
85
90
95
%V_OUT
6.0
%V_OUT
100
µs
70
200
mV
Thermal Protection
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
T_J Rising
160
°C
15
°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. The maximum allowable power dissipation of any T_A (ambient temperature) is P_D(max) = (T_J(max) – T_A) / θ_JA. Exceeding the maximum allowable power
dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Enable pin should not be left open.
September 2010
5
M9999-092410-C