TM
MP1570 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN.......................–0.3V to +26V
Switch Voltage VSW................. –1V to VIN + 0.3V
Boost Voltage VBS..........VSW – 0.3V to VSW + 6V
All Other Pins.................................–0.3V to +6V
Junction Temperature...............................150°C
Lead Temperature....................................260°C
Storage Temperature .............–65°C to +150°C
TOP VIEW
BS
IN
1
2
3
4
8
7
6
5
SS
EN
Recommended Operating Conditions (2)
Input Voltage VIN............................ 4.75V to 23V
Output Voltage VOUT ...................... 1.23V to 20V
Ambient Operating Temperature ... –40°C to +85°C
SW
GND
COMP
FB
MP1570_PD01-SOIC8N
Thermal Resistance (3)
θJA
θJC
SOIC8N ..................................50...... 10... °C/W
Part Number*
Package
Temperature
SOIC8N
(Exposed Pad)
Notes:
MP1570DN
–40° to +85°C
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
For Tape & Reel, add suffix –Z (eg. MP1570DN–Z)
For Lead Free, add suffix –LF (eg. MP1570DN–LF–Z)
*
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
0.3
1.3
Max
3.0
Units
µA
Shutdown Supply Current
Supply Current
VEN = 0V
VEN = 2.7V, VFB = 1.4V
1.5
mA
4.75V ≤ VIN ≤ 23V,
Feedback Voltage
VFB
1.202
1.4
1.230
1.258
1.6
V
VCOMP < 2V
Feedback Overvoltage Threshold
Error Amplifier Voltage Gain (4)
Error Amplifier Transconductance
High Side Switch On Resistance (4)
Low Side Switch On Resistance (4)
High Side Switch Leakage Current
Upper Switch Current Limit
1.5
400
820
100
100
0
V
V/V
µA/V
mΩ
mΩ
µA
AEA
GEA
550
1100
∆IC = ±10µA
RDS(ON)1
RDS(ON)2
VEN = 0V, VSW = 0V
10
4.0
5.8
0.9
7.6
A
Lower Switch Current Limit
From Drain to Source
A
COMP to Current Sense
Transconductance
GCS
4.0
5.4
6.8
A/V
Oscillation Frequency
Fosc1
Fosc2
300
340
110
90
380
KHz
KHz
%
Short Circuit Oscillation Frequency
VFB = 0V
Maximum Duty Cycle
Minimum On Time (4)
DMAX VFB = 1.0V
220
1.5
ns
EN Shutdown Threshold Voltage
VEN Rising
1.1
2.0
V
EN Shutdown Threshold Voltage
Hysteresis
220
mV
MP1570 Rev. 1.5
1/31/2006
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© 2006 MPS. All Rights Reserved.
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