MAX1887 データシートの表示（PDF） - Maxim Integrated
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MAX1887 Datasheet PDF : 33 Pages
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Quick-PWM Slave Controllers for
Multiphase, Step-Down Supplies
ABSOLUTE MAXIMUM RATINGS
V+ to GND ..............................................................-0.3V to +30V
VCC, VDD to GND (Note 3) .......................................-0.3V to +6V
PGND to GND.....................................................................±0.3V
TRIG, LIMIT to GND .................................................-0.3V to +6V
SHDN to GND (MAX1897)........................................-0.3V to +6V
ILIM, CM+, CM-, CS+, CS-, COMP
to GND....................................................-0.3V to (VCC + 0.3V)
TON, POL to GND (MAX1897) ...................-0.3V to (VCC + 0.3V)
DL to PGND................................................-0.3V to (VDD + 0.3V)
BST to GND ............................................................-0.3V to +36V
DH to LX ....................................................-0.3V to (VBST + 0.3V)
LX to BST..................................................................-6V to +0.3V
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
20-Pin 5mm x 5mm QFN (derate 20.0mW/°C
above +70°C)..............................................................1.60W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, VCC = VDD = 5V, VOUT = VCOMP = 1.2V, VCM+ = VCM- = VCS+ = VCS- = 1.2V, SHDN = VCC
(MAX1897), TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
PWM CONTROLLER
Input Voltage Range
On-Time (Note 1)
Battery voltage, V+
VCC, VDD
4.0
28.0
V
4.5
5.5
MAX1887 (300kHz), V+ = 12V, VCOMP = 1.2V
320
355
390
tON
MAX1897,
V+ = 12V,
TON = GND
TON = open
171
190
209
ns
320
355
390
VCOMP = 1.2V
TON = VCC
464
515
566
Trigger Delay (Note 2)
SUPPLY CURRENTS
tTRIG
75
ns
Quiescent Supply Current (V+)
Quiescent Supply Current (VDD)
(Note 3)
I+
Measured at V+; VILIM > 0.35V
IDD
Measured at VDD; VILIM MAX1887
> 0.35V
MAX1897
25
40
µA
525
800
µA
<1
5
Quiescent Supply Current (VCC)
(MAX1897, Note 3)
ICC
Measured at VCC; VILIM > 0.35V
525 800
µA
Standby Supply Current (V+)
Standby Supply Current (VDD)
(Note 3)
Measured at V+; ILIM = GND
Measured at VDD; ILIM
= GND
MAX1887
MAX1897
<1
5
µA
20
40
µA
<1
5
Standby Supply Current (VCC)
(MAX1897, Note 3)
Measured at VCC; ILIM = GND
20
40
µA
Shutdown Supply Current (V+)
(MAX1897)
Measured at V+; VCC = VDD = 0 or 5V,
SHDN = GND
<1
5
µA
Shutdown Supply Current (VDD)
(MAX1897, Note 3)
Measured at VDD; SHDN = GND
<1
5
µA
Shutdown Supply Current (VCC)
(MAX1897, Note 3)
Measured at VCC; SHDN = GND
<1
5
µA
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