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MAX5008CUB+T

P1-P3P4-P6P7-P7
General Description
The MAX5008 charge-pump regulator generates a reg-
ulated 5V output up to 125mA with a 2.95V to 5.5V input
voltage range. The device includes resistor-program-
mable overcurrent limit. The MAX5008 requires a mini-
mum number of external components for normal
operation. The high 1MHz switching frequency allows
the use of small surface-mount ceramic capacitors.
The fault-protection circuitry limits the output current
when it exceeds the limit set by an external resistor.
The output current can range from 1mA to 150mA to
accommodate circuit requirements. A FAULT output
indicates when the device is in current limit or the out-
put is out of regulation.
A low-power shutdown mode reduces supply current to
less than 1µA and places the output in a high-imped-
ance state. The MAX5008 is offered in a space-saving
10-pin µMAX
®
package that is only 1.1mm high.
Applications
Flash Memory Supplies
USB Host Devices
Battery-Powered Systems
3.3V to 5V Local Conversion
Features
♦ Regulated 5V Output Up to 125mA
♦ Indefinite Short-Circuit Protection
♦ Adjustable Output Current Limit
♦ No Inductors Required
♦ 0.1µA Shutdown Current
♦ Thermal Shutdown
♦ Fault Output Indicates Overcurrent or Output
Voltage Out of Regulation
♦ 2.95V to 5.5V Input Voltage Range
♦ 10-Pin µMAX Package
MAX5008
Regulated 5V USB Charge Pump with
Programmable Current Limit
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2426; Rev 1; 7/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE
PIN-PACKAGE
MAX5008CUB 0°C to +70°C 10 µMAX
FAULT
OUT
200Ω*
R
CS
0.4Ω
100kΩ
C
OUT
4.7µF
V
OUT
5V
C
EXT
6.8µF
C
X
0.68µF
4.7µF
47nF*
V
IN
2.95V TO 5.5V
CXN
IN
CXP
RCS
CEXT
GND PGND
46
7
8
5
9
2
1
10
MAX5008
SHDN
*USE IF PRECISION CURRENT LIMIT IS REQUIRED.
200Ω*
3
I
OUT
Typical Operating Circuit
Pin Configuration appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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
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
MAX5008
Regulated 5V USB Charge Pump with
Programmable Current Limit
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(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.)
Note 1: When the input exceeds 4.25V, the power dissipation on the chip exceeds the maximum rating if the output current is 125mA.
Note 2: The MIN/MAX limits are 100% production tested at +25°C and +70°C, and guaranteed by design at 0°C.
Note 3: I
OUT
is output current flowing from C
EXT
.
Note 4: The delay from the fault event to the assertion of FAULT. Fault delays are specified with either a current fault or a voltage
fault, but not both simultaneously.
Note 5: The delay from the removal of the fault event to the deassertion of FAULT.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
UNITS
Thermal Shutdown
Junction Temperature
150
°C
Thermal Shutdown Hysteresis 30 °C
Typical Operating Characteristics
(V
IN
= 3V, C
IN
= 4.7µF, C
X
= 0.47µF, C
OUT
= 4.7µF, C
EXT
= 4.7µF, R
CS
= 0.4Ω, T
A
= +25°C, unless otherwise noted.)
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5008 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
0
2.5 5.5
OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX5008 toc02
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
10010
4.7
4.9
5.1
5.3
5.5
4.5
1 1000
V
IN
= 2.9V
V
IN
= 5.0V
V
IN
= 3.3V
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX5008 toc03
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
54321
1
2
3
4
5
6
0
06
I
LOAD
= 100mA
P1-P3P4-P6P7-P7

MAX5008CUB+T

Mfr. #:
Buy MAX5008CUB+T
Manufacturer:
Maxim Integrated
Description:
Switching Voltage Regulators Regulated 5V USB Charge Pump
Lifecycle:
New from this manufacturer.
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