MIC2800-1.8/1.2/2.5YML データシートの表示（PDF） - Micrel
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MIC2800-1.8/1.2/2.5YML Datasheet PDF : 20 Pages
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Micrel, Inc.
Pin Configuration
MIC2800
3mm x 3mm MLF® (ML)
Fixed DC/DC Converter Output Voltage
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
_____
LOWQ
BIAS
SGND
PGND
SW
VIN
VIN
LDO2
9
FB
10
LDO
11
LDO1
12
POR
13
CSET
14
CBYP
15
EN1
16
EN2
Pin Function
LOWQ Mode. Active Low Input. Logic High = Full Power Mode; Logic Low =
LOWQ Mode; Do not leave floating.
Internal circuit bias supply. It must be de-coupled to signal ground with a 0.1µF
capacitor and should not be loaded.
Signal ground.
Power ground.
Switch (Output): Internal power MOSFET output switches.
Supply Input – DC/DC. Must be tied to PIN7 externally.
Supply Input – LDO2. Must be tied to PIN6 externally.
Output of regulator 2
Feedback. Input to the error amplifier for DC to DC converter. adjust version, co
For fixed output voltages connect to VOUT and an internal resistor network sets the
output voltage
LDO Output: Connect to VOUT of the DC/DC for LOWQ mode operation.
Output of regulator 1
Power-On Reset Output: Open-drain output. Active low indicates an output
undervoltage condition on either one of the three regulated outputs.
Delay Set Input: Connect external capacitor to GND to set the internal delay for the
POR output. When left open, there is minimum delay. This pin cannot be grounded.
Reference Bypass: Connect external 0.1µF to GND to reduce output noise. May be
left open.
Enable Input (DC/DC and LDO1). Active High Input. Logic High = On; Logic Low =
Off; Do not leave floating.
Enable Input (LDO 2). Active High Input. Logic High = On; Logic Low = Off; Do not
leave floating
September 2007
3
M9999-090507-C
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