MIC2546 Datasheet, PDF (2/12 Pages) Micrel Semiconductor – Dual Programmable Current Limit Switch Preliminary Information

MIC2546/2547
Ordering Information
Part Number
Enable
MIC2546-1BM Active High
MIC2546-1BTS Active High
MIC2546-2BM Active Low
MIC2546-2BTS Active Low
MIC2547-1BM Active High
MIC2547-1BTS Active High
MIC2547-2BM Active Low
MIC2547-2BTS Active Low
* Thermal Shutdown Latch
Pin Configuration
MIC2546/2547
INA 1
OUTA 2
ENA 3
NC 4
FLGA 5
GNDB 6
ILIMB 7
OUTB 8
16 OUTA
15 ILIMA
14 GNDA
13 FLGB
12 ENB
11 OUTB
10 NC
9 INB
16-Pin SOP (M)
16-Pin TSSOP (TS)
Latch*
•
•
•
•
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
16-pin SOP
16-pin TSSOP
16-pin SOP
16-pin TSSOP
16-pin SOP
16-pin TSSOP
16-pin SOP
16-pin TSSOP
MIC2546/2547
(ENA)
(FLGA)
(ILIMA)
(ENB)
(FLGB)
LOGIC,
CHARGE
PUMP
LOGIC,
CHARGE
PUMP
(OUTA)
(INA)
(OUTB)
(INB)
(ILIMB) (GND)
Functional Pinout
Micrel
Pin Description
Pin Number
1
2, 16
3
4, 10
5
6, 14
7
8, 11
9
12
13
15
MIC2546/2547
Pin Name
INA
OUTA
ENA
NC
FLGA
GNDB, GNDA
ILIMB
OUTB
INB
ENB
FLGB
ILIMA
Pin Function
Input A: Output A MOSFET drain. Also supplies internal circuitry.
Switch A (Output): Output A MOSFET source. Pins 2 and 16 must be
externally connected.
Enable A (Input): Logic-compatible enable input. Active-high (–1) or active-
low (–2). High input >1.7V typical; low input <1.5V typical. Do not float.
MIC2547 only: Also resets thermal shutdown latch.
Not internally connected.
Fault Flag A (Output): Active-low, open-drain output. Indicates overcurrent
or thermal shutdown conditions. MIC2547 only: latched low on thermal
shutdown.
Ground. Both pins must be connected to GND.
Current Limit Channel B: Sets current-limit threshold using an external
resistor, R_SET, connected to ground. 154Ω < R_SET < 2.29kΩ.
Switch B (Output): Pins 8 and 11 must be externally connected.
Input B
Enable B (Input)
Fault Flag B (Output)
Current Limit Channel A.
2
June 2000