Datasheet

Technical Note
BD9111NV
2/13
www.rohm.com
2010.04 - Rev.B
© 2010 ROHM Co., Ltd. All rights reserved.
●Electrical Characteristics (Ta=25℃, VCC=PVCC=3.3V, EN=VCC.)
Parameter Symbol
Limits
Unit Conditions
Min. Typ. Max.
Standby current ISTB - 0 10 μA EN=GND
Bias current ICC - 250 450 μA
EN Low voltage VENL - GND 0.8 V Standby mode
EN High voltage VENH 2.0 VCC - V Active mode
EN input current IEN - 1 10 μA VEN=5V
Oscillation frequency FOSC 0.8 1 1.2 MHz
Pch FET ON resistance RONP - 200 320 mΩ PVCC=5V
Nch FET ON resistance RONN - 150 270 mΩ PVCC=5V
Output voltage VOUT 3.250 3.300 3.350 V
ITH SInk current ITHSI 10 20 - μA VOUT=3.6V
ITH Source Current ITHSO 10 20 - μA VOUT=3.0V
UVLO threshold voltage VUVLO1 3.6 3.8 4.0 V VCC=5→0V
UVLO release voltage VUVLO2 3.65 3.90 4.2 V VCC=0→5V
Soft start time TSS 0.5 1 2 ms
Timer latch time TLATCH 1 2 3 ms SCP/TSD operated
Output Short circuit Threshold Voltage VSCP - 1.65 2.31 V
OUT
V
OUT
=3.3→0V
●Block Diagram, Application Circuit
Fig.1 BD9111NV TOP View Fig.2 BD9111NV Block Diagram
●Pin number and function
Pin No. Pin name PIN function
1 VOUT Output voltage pin
2 VCC VCC power supply input pin
3 ITH GmAmp output pin/Connected phase compensation capacitor
4 GND Ground
5 PGND Nch FET source pin
6 SW Pch/Nch FET drain output pin
7 PVCC Pch FET source pin
8 EN Enable pin(Active High)
VOUT1
V
CC 2
ITH 3
GND 4
8 EN
7 PVCC
6 SW
5 PGND
TOP View
Output
5V
Input
PV
CC
PGND
SW
GND
Gm Amp.
2.2µH
V
CC
R
S
Q
OSC
UVLO
TSD
22
µF
V
CC
V
CC
CLK
SLOPE
EN
Current
Comp
22µF
8
7
2
6
5
4
Soft
Start
Current
Sense/
Protect
+
Driver
Logic
VREF
ITH
R
ITH
C
ITH
3
SCP
VOUT
1