
LB8655T 
No.8084-2/5
Allowable Operating Range 
at Ta = 25
°
C 
Parameter 
Symbol 
Conditions 
Ratings 
Unit 
VB 
(*2) 
2.0 to 10
Source Voltage Range 
VCC 
VINH 
VINL 
VOC 
2.0 to 10
V 
Input Pin High Level Voltage 
MD1, 2, IN1, 2, EN, INA, B 
1.8 to 10
V 
Input Pin Low Level Voltage 
MD1, 2, IN1, 2, EN, INA, B 
-0.3 to 0.4
V 
Constant Voltage Setting Input Range 
(
*
2) No restriction on priority among applied voltages of VB (Battery power source),  
VCC (step-up power source) and VIN (CPU power source). 
Example1 : VB = 3.3V, VCC = 4.0V, VIN = 5.0V 
Example2 : VB = 3.3V, VIN = 5.0V 
Electrical Characteristics 
at Ta = 25
°
C, VB = VCC = 3V, Rf = 1
VC 
-0.1 to VB
V 
Ratings 
Parameter 
Symbol 
Conditions 
min 
typ 
max 
Unit 
Standby Current Consumption 
ICC0 
ICC1 
ICC2 
ICC3 
ICC4 
IB 
VB = VCC = 8.0V  MD1 to 3, IN1 to 4 = L 
AF mode  IN1 = H (2 phase excitation) 
0.1 
5.0 
μ
A 
24 
32 
AF mode  IN1 = H (1 phase excitation) 
14 
21 
SH mode  IN1 = L 
40 
52 
VCC Operating Current Consumption 
SH mode  IN1 = H  RILM = 2k
16 
20 
mA 
VB Operating Current Consumption 
ZOOM mode  INA = H 
8 
15 
mA 
Reference Voltage 
Vref 
Iref = -500
μ
A 
1.74 
1.8 
1.86 
V 
Reference Voltage start-up time 
Tr 
Design guaranteed 
0.5 
2.0 
μ
s 
Input Pin Current 
IIN 
THD 
VIN = 5.0V 
Design guaranteed (*3) 
70 
90 
μ
A 
Overheat Protection Operation 
Temperature 
[Stepping motor driver for AF] (OUT2 to 3, OUT5 to 6) 
160 
180 
200 
°
C 
Output Saturation Voltage 1 
VSAT1 
VCC = 3.3V, IO = 0.2A (upper and lower)  
0.15 
0.25 
0.40 
V 
[AE driver] (OUT4 to 5) 
Output Saturation Voltage 2 
VSAT2 
VCC = 3.3V, IO = 0.2A (upper and lower)  
0.15 
0.25 
0.40 
V 
[SH driver] (OUT1 to 2) 
Output Constant Current 1 
IO1 
IO2 
VSAT3 
OUT2
→
OUT1 VCC = 3.0 to 3.7V, Rf = 0.53
OUT1
→
OUT2 VCC = 4.2V RILM = 1.6k
VCC = 3.3V, IO = 0.2A (upper and lower)  
203 
215 
227 
Output Constant Current 2 
162 
180 
198 
mA 
Output Saturation Voltage 3 
0.2 
0.3 
0.45 
V 
[DC motor driver for ZOOM] (OUTA to B) 
Output Constant Voltage 
VO 
VSAT4 
VB = 3.0 to 3.7V, VC = 0.5V 
2.41 
2.53 
2.65 
V 
Output Saturation Voltage 4 
VB = 3.3V, IO = 0.3A (upper and lower)  
VB = 3.3V, IO = 0.3A (upper) 
0.20 
0.35 
0.45 
V 
Output Saturation Voltage 5 
(
*
3) For the characteristic within the guaranteed temperature range, shipping check is performed at Ta = 25
°
C.  
For all temperature range, it is design guaranteed. 
VSAT5 
0.1 
0.15 
0.25 
V