Datasheet

MAX8627
Low V
BATT
, 20µA IQ, 1MHz Synchronous
Boost Converter with True Shutdown
3
Maxim Integrated
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 CONDITIONS MIN TYP MAX UNITS
p-Channel Turn-Off Current 10 mA
T
A
= +25°C 0.1 1
POUT Leakage Current V
LX
= 0V, V
POUT
= V
BATT
= 5.5V
T
A
= +85°C 0.2
µA
T
A
= +25°C 0.1 1
LX Leakage Current
V
LX
= 0V and V
POUT
= 5.5V or V
LX
=
5.5V and V
OUTS
= V
POUT
= 0V
T
A
= +85°C 0.2
µA
Soft-Start Interval Output current = 0.5A 5.25 ms
Overload Protection Fault Delay 65 ms
LOGIC INPUTS
1.5V < V
POUT
= V
OUTS
= V
BATT
≤ 1.8V 0.2
ON Input Low Level
1.8V < V
POUT
= V
OUTS
= V
BATT
≤ 5.5V 0.5
V
1.5V < V
POUT
= V
OUTS
= V
BATT
≤ 1.8V
V
POUT
-
0.2
ON Input High Level
1.8V < V
POUT
= V
OUTS
+ V
BATT
≤ 5.5V 1.6
V
T
A
= +25°C 0.01 1
ON, Input Leakage Current
V
OUTS
= V
POUT
= V
BATT
= 5.5V,
ON = 0V or ON = 5.5V
T
A
= +85°C 0.02
µA
Thermal Shutdown +160 °C
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.