NCP1422 Datasheet, PDF (2/14 Pages) ON Semiconductor – 800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and Ring−Killer

NCP1422
0.5 V _Chip
Enable
FB
+
1
−
PFM
REF
5
Voltage
Reference
LBI/EN
2
1.20 V
+
−
V_BAT
BAT
M3 ₆
ZLC ₊
−
+
20 mV
CONTROL LOGIC
TRUE CUTOFF
CONTROL
_ZCUR _TSDON
V_DD
_MSON
_MAINSW2ON
M2
SENSEFETt
M1
LX
V_DD ⁸
OUT
10
V_OUT
_CEN
GND
_PFM
V_DD
_MAINSWOFD
_SYNSW2ON
7
GND
_SYNSWOFD
_V_REFOK
_ILIM
+
−
GND
R_SENSE
+
GND
LBO
3
GND
Figure 1. Detailed Block Diagram
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2