TM
MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER
PACKAGE REFERENCE
TOP VIEW
EN
GND
SW
1
2
3
5
FB
ABSOLUTE MAXIMUM RATINGS
(1)
V
IN
to GND .................................. –0.3V to +6.5V
V
SW
to GND........................... –0.3V to V
IN
+0.3V
V
FB
, V
EN
to GND.......................... –0.3V to +6.5V
Junction Temperature.............................+150°C
Lead Temperature ..................................+260°C
Storage Temperature .............–65°C to +150°C
C 6 YW
Recommended Operating Conditions
4
IN
(2)
Supply Voltage V
IN
............................. 2.5V to 6V
Output Voltage V
OUT
.......................... 0.6V to 6V
Operating Temperature .............–40°C to +85°C
MP1557_PD01_TSOT23-5
Thermal Resistance
Part Number*
MP2105DJ
*
Package
TSOT23-5
Temperature
–40°C to +85°C
(3)
TSOT23-5.............................. 220 .... 110..
°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
θ
JA
θ
JC
For Tape & Reel, add suffix –Z (eg. MP2105DJ–Z)
For Lead Free, add suffix –LF (eg. MP2105DJ–LF–Z)
ELECTRICAL CHARACTERISTICS
(4)
V
IN
= V
EN
= 3.6V, T
A
= +25°C, unless otherwise noted.
Parameter
Supply Current
Shutdown Current
IN Undervoltage Lockout
Threshold
IN Undervoltage Lockout
Hysteresis
Regulated FB Voltage
FB Input Bias Current
PFET On Resistance
NFET On Resistance
SW Leakage Current
PFET Current Limit
Oscillator Frequency
Thermal Shutdown Trip
Threshold
EN Trip Threshold
EN Input Current
f
OSC
Symbol Condition
V
EN
= V
IN
, V
FB
= 0.65V
V
EN
= 0V, V
IN
= 6V
Rising Edge
Min
Typ
440
0.10
2.30
55
V
FB
T
A
= +25°C
–40°C
≤
T
A
≤
+85°C
V
FB
= 0.65V
I
SW
= 100mA
I
SW
= –100mA
V
EN
= 0V, V
IN
= 6V,
V
SW
= 0V or 6V
Duty Cycle = 100%,
Current Pulse Width < 1ms
0.588
0.582
–50
0.600
0.600
0.5
0.42
0.26
0.612
0.618
+50
Max
600
1
2.40
Units
µA
µA
V
mV
V
nA
Ω
Ω
µA
A
MHz
°C
1.5
+1
V
µA
2.15
–1
1.2
0.85
1.6
1.05
145
+1
2.1
1.25
–40°C
≤
T
A
≤
+85°C
V
EN
= 0V to 6V
0.3
–1
0.96
Notes:
4) 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.
MP2105 Rev. 1.2
8/19/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
2
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