MAX679EUA Maxim Integrated Products, MAX679EUA Datasheet - Page 5

• Manufacturer Part Number: MAX679EUA
• Description: Charge Pumps
• Manufacturer: Maxim Integrated Products

Specifications of MAX679EUA

• Function: Step Up
• Output Voltage: 3.3 V
• Output Current: 20 mA
• Maximum Operating Temperature: + 85 C
• Package / Case: uMAX-8
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

Figure 1. Block Diagram
SHDN
FSET
GND
_______________________________________________________________________________________
OUT
SW
T
C
SC
PULSER
=
=
=
=
SWITCH CONNECTS OUT TO IN DURING START-UP
TRANSFER PHASE OF PUMP
CHARGE PHASE OF PUMP (FULL STRENGTH)
CHARGE PHASE OF PUMP (REDUCED STRENGTH)
MAX679
1.25V REF
CHIP SUPPLY
Regulated 3.3V Charge Pump
EAOUT (1 = OUTPUT OVER REGULATION POINT)
CONTROL LOGIC
2
OSCILLATOR +
IN
12
COUNTER
RESET
P6
CLOCK
SW
C
T
SC
P5
OUT
SC
C
P4
P1
T
SW
10% OF N1
C
T
P3
P2
N1
PGND
C1+
C1-
C1
5