MIC2202-1.5BML TR Micrel Inc, MIC2202-1.5BML TR Datasheet - Page 6

• Manufacturer Part Number: MIC2202-1.5BML TR
• Description: IC REG PWM SYNC 2MHZ 1.5V 10-MLF
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of MIC2202-1.5BML TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.5V
• Current - Output: 600mA
• Frequency - Switching: 2MHz
• Voltage - Input: 2.3 ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-MLF®, QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: MIC2202-1.5BMLTR; MIC2202-1.5BMLTR

Functional Description
VIN
VIN provides power to the output and to the internal bias
supply. The supply voltage range is from 2.3V to 5.5V. A
minimum 1µF ceramic is recommended for bypassing
the input supply.
Enable
The enable pin provides a logic level control of the
output. In the off state, supply current of the device is
greatly reduced (typically <1µA). Also, in the off state,
the output drive is placed in a “tri-stated” condition,
where both the high side P-Channel MOSFET and the
low-side N-Channel are in an off or non-conducting
state. Do not drive the enable pin above the supply
voltage.
Sync_In
Sync_In pin enables the ability to change the funda-
mental switching frequency. The Sync_In frequency has
a minimum frequency of 1.6MHz and a maximum sync
frequency of 2.5MHz.
Careful attention should be paid to not driving the
Sync_In pin greater than the supply voltage. While this
will not damage the device, it can cause improper
operation.
Micrel, Inc.
March 2007
Figure 1. Master-Slave Operation
VIN
SYNC_IN
SYNC_OUT
VIN
SYNC_IN
SYNC_OUT
“Master”
MIC2202
MIC2202
“Slave”
6
BIAS
BIAS
SW
SW
FB
FB
Sync_Out
Sync_Out is an open collector output that provides a
signal equal to the internal oscillator frequency. This
creates the ability for multiple MIC2202s to be connected
together in a master-slave configuration for frequency
matching of the converters. A typical 10kΩ is
recommended for a pull-up resistor.
Bias
The bias supply is an internal 2.3V linear regulator that
supplies the internal biasing voltage to the MIC2202. A
10nF ceramic capacitor is required on this pin for
bypassing. Do not use the bias pin as a supply. The bias
pin was designed to supply internal power only.
Feedback
The feedback pin provides the control path to control the
output. A resistor divider connecting the feedback to the
output is used to adjust the desired output voltage. Refer
to the feedback section in the “Applications Information”
for more detail.
M9999-031907
MIC2202