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