Rainbow Electronics MAX679 - Manual (Page 5)

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