MP28115 Datasheet, PDF (2/11 Pages) Monolithic Power Systems – 4A, 1.5MHz Synchronous Step-Down Converter

MP28115 – 4A, 1.5MHz SYNCHRONOUS STEP-DOWN CONVERTER
PACKAGE REFERENCE
TOP VIEW
FB 1
GND 2
SW 3
IN 4
BS 5
EXPOSED PAD
ON BACKSIDE
10 EN/SYNC
9 GND
8 SW
7 IN
6 POK
Part Number*
MP28115DQ
Package
QFN10
(3mm x 3mm)
Temperature
–40°C to +85°C
* ^{For Tape & Reel, add suffix –Z (e.g. MP28115DQ–Z)}
For RoHS Compliant Packaging, add suffix –LF
(e.g. MP28115DQ–LF–Z)
ABSOLUTE MAXIMUM RATINGS ⁽¹⁾
IN to GND ....................................-0.3V to +6.5V
SW to GND ........................... -0.3V to V_IN + 0.3V
SW to GND ............ -2.5V to V_IN+2.5V for <50nS
FB, EN/SYNC, POK to GND...........-0.3V to +6.5V
BS to SW .....................................-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_IN............................. 2.7V to 6V
Output Voltage V_OUT ................. 0.8V to 0.9 x V_IN
Operating Temperature ..............-40°C to +85°C
Thermal Resistance ⁽³⁾ θ_JA θ_JC
QFN10 (3mm x 3mm) ............. 50 ...... 12... °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.
ELECTRICAL CHARACTERISTICS ⁽⁴⁾
V_IN = V_EN = 3.6V, T_A = +25°C, unless otherwise noted.
Parameters
Condition
Supply Current
Shutdown Current
IN Undervoltage Lockout
Threshold
V_EN = V_IN
V_FB = 0.85V
V_EN = 0V, V_IN = 6V
Rising Edge
IN Undervoltage Lockout
Hysteresis
Regulated FB Voltage
FB Input Current
EN High Threshold
EN Low Threshold
Internal Soft-Start Time
T_A = +25°C
–40°C ≤ T_A ≤ +85°C
V_FB = 0.85V
–40°C ≤ T_A ≤ +85°C
–40°C ≤ T_A ≤ +85°C
High-Side Switch On-Resistance
Low-Side Switch On-Resistance
SW Leakage Current
I_SW = 300mA
I_SW = –300mA
V_EN = 0V; V_IN = 6V
V_SW = 0V or 6V
BS Under Voltage Lockout
Threshold
Min Typ Max Units
750
μA
1
μA
2.59 2.69
V
210
mV
0.788 0.800 0.812 V
0.780 0.800 0.820 V
±50
nA
1.6
V
0.4
V
120
µs
60
mΩ
60
mΩ
–10
10
μA
1.8
V
MP28115 Rev. 0.92
www.MonolithicPower.com
2
8/23/2010
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