MIC2178-5.0YWM TR Micrel Inc, MIC2178-5.0YWM TR Datasheet - Page 2

• Manufacturer Part Number: MIC2178-5.0YWM TR
• Description: IC REG SYNCBCK 2.5A 5.0V 20SOIC
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of MIC2178-5.0YWM TR

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 2.5A
• Frequency - Switching: 200kHz
• Voltage - Input: 4.5 ~ 16.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: MIC2178-5.0YWMTR; MIC2178-5.0YWMTR

MIC2178
Ordering Information
Pin Configuration
Pin Description
M9999-031805
14, 15, 16, 17
Pin Number
4, 5, 6, 7
1, 2, 9
3, 8
10
11
12
13
18
19
20
Standard*
MIC2178BWM
MIC2178-3.3BWM
MIC2178-5.0BWM
* Standard product will be supported as Pb-Free IAW PPCN #040004 effective 1-1-2005.
Pin Name
PWRGD
PGND
COMP
SGND
SYNC
PWM
BIAS
VIN
SW
EN
FB
Part Number
PGND
PGND
PGND
PGND
PWM
VIN
VIN
VIN
SW
SW
20-Lead Wide Power SOIC
Pb-Free
MIC2178YWM
MIC2178-3.3YWM
MIC2178-5.0YWM
10
1
2
3
4
5
6
7
8
9
Pin Function
Supply Voltage (Input): Requires bypass capacitor to PGND. All three pins
must be connected to V
Switch (Output): Internal power MOSFET output switches. Both pins must
be externally connected together.
Power Ground: Connect all pins to central ground point.
PWM/Skip-Mode Control (Input): Logic-level input. Controls regulator
operating mode. Logic low enables PWM mode. Logic high enables skip
mode. Do not allow pin to float.
Error Flag (Output): Open-drain output. Active low when FB input is 10%
below the reference voltage (V
Feedback (Input): Connect to output voltage divider resistors.
Compensation: Output of internal error amplifier. Connect capacitor or
series RC network to compensate the regulator control loop.
Signal Ground: Connect all pins to ground, PGND*.
Frequency Synchronization (Input): Optional. Connect an external clock
signal to synchronize the oscillator. Leading edge of signal above 1.7V
terminates switching cycle. Connect to SGND if not used.
Internal 3.3V Bias Supply: Decouple with 0.01µF bypass capacitor to
SGND. Do not apply any external load.
Enable (Input): Logic high enables operation. Logic low shuts down
regulator. Do not allow pin to float.
2
Voltage
20
19
18
17
16
15
14
13
12
11 PWRGD
3.3V
5.0V
ADJ
IN
.
EN
BIAS
SYNC
SGND
SGND
SGND
SGND
COMP
FB
REF
).
Junction Temp.
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
20-lead WSOIC
20-lead WSOIC
20-lead WSOIC
Package
March 2005
Micrel, Inc.