Datasheet

MAX5008
Regulated 5V USB Charge Pump with
Programmable Current Limit
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= SHDN = 3V, C
IN
= 4.7µF, C
X
= 0.68µF, C
EXT
= 6.8µF, C
OUT
= 4.7µF, R
CS
= 0.4Ω, T
A
= 0°C to +70°C, unless otherwise noted.
Typical values are at T
A
= +25°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.
IN, SHDN, RCS, FAULT, OUT to GND .....................-0.3V to +6V
PGND to GND.....................................................................±0.3V
CXN to GND ................................................-0.3V to (V
IN
+ 0.3V)
CXP to GND ............................................-0.3V to (V
CEXT
+ 0.3V)
CEXT to GND ..........................................-0.3V to (V
CEXT
+ 0.3V)
Short-Circuit Duration to GND .......................................Indefinite
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX.................................................................444mW
Operating Temperature Range...............................0°C to +70°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
I
OUT
= 125mA, 4.75V ≤ V
OUT
≤ 5.25V
2.95 4.25
Input Voltage Range
(Note 1)
V
IN
I
OUT
= 70mA
2.95 5.50
V
Input Undervoltage Lockout
Threshold
Rising edge 2.0
2.35
2.6 V
Input Undervoltage Lockout
Hysteresis
Falling edge
100
mV
0 ≤ I
OUT
< 30mA, 2.95V < V
IN
< 5.5V
4.75
5.0
5.30
Output Voltage
(Note 2)
V
OUT
0mA ≤ I
OUT
≤ 125mA, 2.95V ≤ V
IN
≤ 4.25V
4.75
5.0
5.25
V
Output Voltage Ripple V
RIP
0mA ≤ I
OUT
≤ 125mA
100
mV
V
OUT
Fault Threshold V
TH
V
OUT
= 5V (nominal), no load
82.5 92.5
%V
OUT
Maximum Output Current I
OUT
V
OUT
= 5V ±4%
100 140
mA
I
OUT
= 0, V
IN
= 4.25V 0.6 6
No-Load Input Current I
Q
I
OUT
= 0, V
IN
= 3.3V 1 6
mA
SHDN Logic High
V
INH
,
SHDN
2.4 V
SHDN Logic Low
V
INL
,
SHDN
0.4 V
Shutdown Supply Current
I
QSHDN
SHDN = low 0.1 10 µA
Current-Sense Trip Level V
CS
V
CS
= I
OUT
x R
CS
(Note 3) 55 60 73 mV
FAULT Leakage Current V
FAULT
= 5V, OUT in regulation 1 µA
FAULT Logic Low I
OUT
> I
LIMIT
, or V
OUT
< V
TH
, I
FAULT
= 1mA 0.4 V
I
OUT
> I
LIMIT
2ms
FAULT Assertion Delay
(Note 4)
t
FD
V
OUT
< V
TH
30 µs
FAULT Deassertion Delay (Note 5)
t
FDD
I
OUT
< I
LIMIT
and V
OUT
> 4.5V 16 ms
Switching Frequency 0.5 1 1.5 MHz
Startup Time t
START
V
OUT
> V
TH
, R
LOAD
= 46Ω, from rising edge
of SHDN
200
µs