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
Note 1:
LX has internal clamp diodes to the IC internal power node V
PWR
(where V
PWR
is the higher of BATT or POUT) and PG.
Applications that forward bias these diodes should take care not to exceed the device’s power-dissipation limits.
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
OUTS
= V
POUT
= 5V, V
ON
= V
BATT
= 3.6V, V
ILIM
= GND, T
A
= -40°C to +85°C, typical values are at T
A
= +25°C, unless otherwise
noted.)
PARAMETER
GENERAL
Operating Input Voltage Range
Minimum Startup Voltage
Maximum Startup Current Limit
Shutdown, ON = GND
Supply Current
No load, no switching
No load, switching
OSCILLATOR
Switching Frequency
Startup Switching Frequency
Maximum Duty Cycle
Output Voltage Adjust Range
FB Regulation Voltage
FB Load Regulation
FB Line Regulation
FB Input Leakage Current
ILIM Dual Mode™ Threshold
Idle Mode Trip Level
DC-DC SWITCHES
n-Channel On-Resistance
p-Channel On-Resistance
Damping Switch On-Resistance
n-Channel Current limit
V
ILIM
= 0V
V
ILIM
= 0.6V
3.2
0.15
0.15
17
3.5
1.0
0.25
0.25
30
3.7
Ω
Ω
Ω
A
No load
0A to 1A output current load step
V
BATT
= 2.7V to 3V, output current = 0.5A
T
A
= +25°C
V
FB
= 1.2V,
V
OUTS
= V
POUT
= V
BATT
= 5.5V T
A
= +85°C
Low level
High level
(Note 3)
0.45
50
-50
82.5
3.0
1.005
1.015
-30
+20
-10
-10
0.25
+50
0.95
1.0
2.0
87.0
5.2
1.025
1.05
MHz
MHz
%
V
V
mV/A
mV
nA
V
mA
T
A
= +25°C
T
A
= +85°C
T
A
= 0°C to +85°C
T
A
= -40°C (Note 2)
(Note 1)
No load (Note 1)
0.9
1.2
0.5
0.1
0.2
20
20
20
30
35
µA
1
5.5
1.5
V
V
A
CONDITIONS
MIN
TYP
MAX
UNITS
Dual Mode is a trademark of Maxim Integrated Products, Inc.
2
Maxim Integrated
MAX8627
Low V
BATT
, 20µA IQ, 1MHz Synchronous
Boost Converter with True Shutdown
ELECTRICAL CHARACTERISTICS (continued)
(V
OUTS
= V
POUT
= 5V, V
ON
= V
BATT
= 3.6V, V
ILIM
= GND, T
A
= -40°C to +85°C, typical values are at T
A
= +25°C, unless otherwise
noted.)
PARAMETER
p-Channel Turn-Off Current
POUT Leakage Current
LX Leakage Current
Soft-Start Interval
Overload Protection Fault Delay
LOGIC INPUTS
ON Input Low Level
1.5V < V
POUT
= V
OUTS
= V
BATT
≤
1.8V
1.8V < V
POUT
= V
OUTS
= V
BATT
≤
5.5V
1.5V < V
POUT
= V
OUTS
= V
BATT
≤
1.8V
1.8V < V
POUT
= V
OUTS
+ V
BATT
≤
5.5V
ON, Input Leakage Current
Thermal Shutdown
V
OUTS
= V
POUT
= V
BATT
= 5.5V,
ON = 0V or ON = 5.5V
T
A
= +25°C
T
A
= +85°C
V
POUT
-
0.2
1.6
0.01
0.02
+160
1
µA
°C
0.2
0.5
V
V
LX
= 0V, V
POUT
= V
BATT
= 5.5V
V
LX
= 0V and V
POUT
= 5.5V or V
LX
=
5.5V and V
OUTS
= V
POUT
= 0V
Output current = 0.5A
T
A
= +25°C
T
A
= +85°C
T
A
= +25°C
T
A
= +85°C
CONDITIONS
MIN
TYP
10
0.1
0.2
0.1
0.2
5.25
65
1
1
MAX
UNITS
mA
µA
µA
ms
ms
ON Input High Level
V
Note 1:
The MAX8627 is powered from OUTS. Once started, the IC operates down to 0.9V.
Note 2:
Specifications to -40°C are guaranteed by design and not production tested.
Note 3:
The idle-mode current threshold is the transition point between fixed-frequency PWM operation and idle-mode operation.
The specification is given in terms of output load current for an inductor value of 1µH. For a step-up converter, the idle-
mode transition varies with the input-to-output voltage ratio.
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