MP2109 – DUAL 1.2MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER
MP2109 Rev.1.4 www.MonolithicPower.com 2
1/22/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
PACKAGE REFERENCE
Part Number* Package Temperature
MP2109DQ
QFN10
(3mm x 3mm)
–40°C to +85°C
*
For Tape & Reel, add suffix –Z (eg. MP2109DQ–Z)
For Lead Free, add suffix –LF (eg. MP2109DQ–LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
V
IN1/IN2
to GND ............................ –0.3V to +6.5V
V
SW1/SW2
to GND................... –0.3V to V
IN
+ 0.3V
V
FB1/FB2
, V
EN1/EN2
to GND ............. –0.3V to +6.5V
Junction Temperature.............................+150°C
Lead Temperature ..................................+260°C
Storage Temperature .............–65°C to +150°C
Recommended Operating Conditions
(2)
Supply Voltage V
IN1/IN2
....................... 2.5V to 6V
Output Voltage V
OUT1/OUT2
.................. 0.6V to 6V
Operating Temperature .............–40°C to +85°C
Thermal Resistance
(3)
θ
JA
θ
JC
QFN10 (3mm x 3mm) ............. 50 ...... 12... °C/W
Maximum Power Dissipation
(4)
(T
A
=25°C)
QFN10 (3mm x 3mm) ............. P
D
...... 2.5 ....... 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 JESD51-7 4-layer board.
4) Reduce 0.2 watts every 10°C increasing.
ELECTRICAL CHARACTERISTICS
(5)
V
IN1/IN2
= V
EN1/EN2
= 3.6V, T
A
= +25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
Each Converter Supply Current V
EN1/EN2
= V
IN1/IN2
, V
FB1/FB2
= 0.65V 440 600 µA
Each Converter Shutdown
Current
V
EN1/EN2
= 0V, V
IN1/IN2
= 6V 0.10 1 µA
IN Under Voltage Lockout
Threshold
Rising Edge 2.15 2.30 2.40 V
IN Under Voltage Lockout
Hysteresis
55 mV
T
A
= +25°C 0.588 0.600 0.612
Regulated FB Voltage V
FB
–40°C ≤ T
A
≤ +85°C 0.582 0.600 0.618
V
FB Input Bias Current I
FB
V
FB1/FB2
= 0.65V –50 0.5 +50 nA
PFET On Resistance I
SW1/SW2
= 100mA 0.42 Ω
NFET On Resistance I
SW1/SW2
= –100mA 0.26 Ω
SW Leakage Current
V
EN1/EN2
= 0V, V
IN1/IN2
= 6V
V
SW1/SW2
= 0V or 6V
–2 +2 µA
PFET Current Limit
Duty Cycle = 100%,
Current Pulse Width < 1ms
0.9 1.3 1.8 A
Oscillator Frequency f
OSC
0.99 1.24 1.49 MHz
Thermal Shutdown Trip
Threshold
150
°C
EN Enable Threshold –40°C ≤ T
A
≤ +85°C 0.3 0.96 1.5 V
EN Input Current V
EN1/EN2
= 0V to 6V –1 +1 µA
Notes:
5) Production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.
MP2109_PD02_QFN10
TOP VIEW
EN1
FB1
IN2
GND2
SW2
1
2
3
4
5
SW1
GND1
IN1
FB2
EN2
10
9
8
7
6
EXPOSED PAD
ON BACKSIDE
