MIC2591B
Micrel
Absolute Maximum Ratings
(1)
Supply Voltages
12VIN[A/B] ............................................................... 14V
3VIN[A/B], VSTBY[A/B] ............................................... 7V
Any Logic Pin......................... –0.5V (min) to 3.6V (max)
Output Current (/FAULT[A/B], /INT, SDA) ................... 10mA
Power Dissipation ..................................... Internally Limited
Lead Temperature (Soldering)
Standard Package (-xBTQ)
(IR Reflow, Peak Temperature)........ 240°C +0°C/–5°C
Pb-Free Package (-xYTQ)
(IR Reflow, Peak Temperature)........ 260°C +0°C/–5°C
Storage Temperature ................................ –65°C to +150°C
ESD Rating
(3)
Human Body Model ................................................... 2kV
Machine Model ........................................................ 200V
Operating Ratings
(2)
Supply Voltages
12VIN[A/B] ................................................ 11.0V to 13.0V
3VIN[A/B] ......................................................3.0V to 3.6V
VSTBY[A/B] ..................................................3.0V to 3.6V
Ambient Temperature (T
A
) ............................. 0°C to + 70°C
Junction Temperature (T
J
) ......................................... 125°C
Package Thermal Resistance
TQFP
(θ
JA
)
.......................................................
56.5°C/W
Electrical Characteristics
(4)
Symbol
I
CC12
I
CC3.3
I
CCSTBY
V
UVLO(12V)
V
UVLO(3V)
V
UVLO(STBY)
V
HYSUV
Parameter
Supply Current
12V
IN[A/B]
= 12V, 3V
IN[A/B]
= 3.3V, V
STBY[A/B]
= 3.3V, T
A
= 25°C, unless otherwise noted.
Bold
indicates specification applies over the
full operating temperature range from 0°C to +70°C.
Condition
Min
Typ
2.5
0.5
2.5
12V
IN[A/B]
increasing
3V
IN[A/B]
increasing
V
STBY[A/B]
increasing
8
2.2
2.8
9
2.5
2.9
180
50
Max
5
1
5
10
2.75
3.0
Units
mA
mA
mA
V
V
V
mV
mV
Power Control and Logic Sections
Undervoltage Lockout Thresholds
12VIN[A/B]
3VIN[A/B]
VSTBY[A/B]
Undervoltage Lockout Hysteresis
12V
IN
, 3V
IN
V
HYSSTBY
V
UVTH(12V)
V
UVTH(3V)
V
UVTH(VAUX)
V
HYSPG
V
GATE(12V)
Power-Good Undervoltage Thresholds
12VOUT[A/B]
3VOUT[A/B]
VAUX[A/B]
Power-Good Detect Hysteresis
12VGATE Voltage
12VGATE Sink Current
Undervoltage Lockout Hysteresis
V
STBY[A/B]
12V
OUT[A/B]
decreasing
3V
OUT[A/B]
decreasing
V
AUX[A/B]
decreasing
10.2
2.7
2.7
0
10.5
2.8
2.8
30
10.8
2.9
2.9
1.5
V
V
V
mV
V
µA
mA
I
GATE(12VSINK)
Start Cycle
Any fault condition
(V
DD
–V
GATE
) = 2.5V
Start Cycle
Any fault condition
V
GATE
= 2.5V
15
–20
12V
IN
–1.5
15
40
25
35
I
GATE(12VPULLUP)
12VGATE Pull-up Current (Fault Off)
V
GATE(3V)
3VGATE Voltage
3VGATE Sink Current (Fault Off)
I
GATE(3VSINK)
I
GATE(3VCHARGE)
3VGATE Charge Current
25
12V
IN
35
V
µA
mA
CFILTER[A/B] Overcurrent Delay Time, Pin 20 (RFILTER[A&B]) Floating or NC
V
FILTER
I
FILTER
CFILTER[A/B] Threshold Voltage
CFILTER[A/B] Charging Current
Delay
ms
�½
C
FILTER
F
V
FILTER
(V)
I
FILTER
A
10
3
1.20
V
12VIN
– V
12VSENSE
> V
THILIMIT
and/or
V
3VIN
– V
3VSENSE
> V
THILIMIT
1.25
1.30
V
1.80
2.5
5.0
µA
Notes:
1.
2.
3.
4.
Exceeding measurements given within the “Absolute Maximum Ratings” section may damage the device.
The device is not guaranteed to function outside of the measurements given in the “Operating Ratings" section.
Devices are ESD sensitive. Employ proper handling precautions. The human body model is 1.5kΩ in series with 100pF.
Specification for packaged product only.
March 2005
7
M9999-033105
MICREL [ MICREL SEMICONDUCTOR ]
