MAX887HESA Maxim Integrated Products, MAX887HESA Datasheet - Page 2

• Manufacturer Part Number: MAX887HESA
• Description: DC/DC Switching Controllers 100% Duty Step-Down DC/DC Converter
• Manufacturer: Maxim Integrated Products

Specifications of MAX887HESA

• Output Voltage: 1.25 V to 10.5 V
• Output Current: 600 mA
• Input Voltage: 3.5 V to 11 V
• Supply Current: 2.7 mA
• Switching Frequency: 300 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C

ABSOLUTE MAXIMUM RATINGS
REF, FB, SYNC, VL to GND..................................... -0.3V to +6V
V+ to GND ............................................................. -0.3V to +12V
SHDN, LX to GND ....................................... -0.3V to (V+ + 0.3V)
PGND to GND ...................................................... -0.3V to +0.3V
Continuous Power Dissipation (T
100% Duty Cycle, Low-Noise,
Step-Down, PWM DC-DC Converter
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
(V+ = +7V, PGND = GND = 0V, SHDN = V+, (T
2
Note 1: Guaranteed by design and not production tested.
Supply Range
Quiescent Supply Current
(PWM Mode)
Quiescent Supply Current
(PFM Mode)
Shutdown Supply Current
Output Voltage Range
Load Regulation
Line Regulation
PWM FB Feedback Threshold
FB Input Current
SYNC Frequency
SYNC Pulse Width High or Low
PWM Maximum Duty Cycle
PWM Switching Frequency
High-Side Current Limit
LX On-Resistance
LX Leakage Current
LX Reverse Leakage Current,
Regulator Off
Undervoltage Lockout
Startup Voltage
SYNC Input High Voltage
SYNC Input Low Voltage
SYNC Input Current
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN Input Current, Sinking
SHDN Input Capacitance
VL Output Voltage
REF Output Voltage
SO (derate 9.09mW/°C above +70°C) .........................471mW
_______________________________________________________________________________________
PARAMETER
A
= +70°C)
V
PWM, DUTY
SYNC, PW
OUT, RANGE
V
C
SYMBOL
I
V
V
V
I
V
V
I
I
V+, SHDN
IN-, SHDN
I
I
R
IN, SYNC
V+, PWM
LXLKGR
+, START
IH, SHDN
V+, PFM
I
IH, SYNC
IL, SYNC
IL, SHDN
IN, SHDN
+, UVLO
f
LXLKG
I
V
SYNC
f
ON, LX
LIM+
V
OSC
I
V+
V
REF
FB
FB
L
A
= 0°C to T
I
I
SHDN = GND
Circuit of Figure 2
I
V
SYNC = 3.0V, PWM duty cycle = 50%
FB = 1.30V
SYNC = 3.0V, FB = 1.18V
SYNC = 3.0V
I
V+ = 12V, LX = GND to 12V
V+ = floating, LX = 5V, SHDN = GND
V+ falling
V+ rising
SYNC = GND or 3V
SHDN = GND or V+
(Note 1)
I
0µA to 30µA
OUT
OUT
OUT
LX
VL
IN
= ±100mA
= 0mA to 1mA
= 4V to 11V, PWM mode
= 0mA, SYNC = 3.0V
= 0mA, SYNC = GND
= 0mA to 500mA
MAX
CONDITIONS
), unless otherwise noted.)
Operating Temperature Ranges
Storage Temperature Range ........................... -65°C to +165°C
Lead Temperature (soldering, 10sec) ............................ +300°C
MAX887HC/D.......................................................0°C to +70°C
MAX887HESA ...................................................-40°C to +85°C
1.225
1.25
0.75
MIN
500
100
260
3.5
-10
2.5
2.4
25
0.005
1.250
TYP
1.25
300
2.7
0.2
2.5
0.2
1.0
0.6
1.0
1.0
3.0
3.1
3.3
±0.10
10.50
1.275
MAX
11.0
1.40
440
340
4.0
0.5
3.3
3.5
0.5
0.8
±1
±1
10
20
10
5
UNITS
%/mA
%/V
kHz
kHz
mA
mA
µA
µA
µA
µA
µA
µA
ns
pF
%
Ω
V
V
V
A
V
V
V
V
V
V
V
V